五年级解方程练习及答案
猪的优点-平安夜圣诞节
五年级解方程题有答案
(
1
)
(0.5+x)+x=9.8 *2
(
2
)
2(X+X+0.5)=9.8
(
3
)
25000+x=6x
(
4
)
3200=440+5X+X
(
5
)
X-0.8X=6
(6)12x-8x=4.8
(7)
7.5+2X=15
(8)1.2x=81.6
(
7
)
x+5.6=9.4
(10)x-0.7x=3.6
(11)91 -x
=
1.3
(
12
)
X+8.3=10.7
(13)
15x
=
3
(14) 3x
-
8
=
16
(15) 3x+9=27
(16) 18(x-2)=270
(17)
12x=300-4x
(18) 7x+5.3=7.4
(19)
3x
廿
=4.8
(25)
0.5x+8=43
(26) 6x-3x=18
(27)
7(6.5+x)=87.5
1 19
(
28
)
0.273 *0.35
(
40
)
20-9x=2
(29) 1.8x=0.972
(41) x+19.8=25.8
(30) x P.756=90
(42
)
5.6x=33.6
(31)
0.1(x+6)=3.3
X
0.4
(32) (27.5-3.5) -nx=4
(33)
9x-40=5
(34)
x
-
5+9=21
(35)
48-27+5x=31
(36) 10.5+x+21=56
(
37
)
x+2x+18=78
(38)
(200-x)
廿
=30
(39)
(x-140)
-
70=4
2
19
(
43
)
9.8-x=3.8
(
44
)
75.6 -
(
=12.6
(
45
)
5x+12.5=32.3
(
46
)
5(x+8)=102
(
47
)
x+3x+10=70
(
48
)
3(x+3)=50-x+3
(
49
)
5x+15=60
(
50
)
3.5-5x=2
(
51
)
0.3
X
7+4x=12.5
(
52
)
x
-
1.5-1.25=0.75
(
53
)
4x-1.3
X
6=2.6
(
54
)
6x+12.8=15.8
(
55
)
150
X
2+3x=690
(
56
)
2x-20=4
(
57
)
3x+6=18
(
58
)
2(2.8+x)=10.4
(
59
)
(x-3)
十
2=7.5
(
60
)
13.2x+9x=33.3
(
61
)
3x=x+100
(
62
)
x+4.8=7.2
(
63
)
6x+18=48
(
64
)
3(x+2.1)=10.5
(
65
)
12x-9x=8.7
(
66
)
13(x+5)=169
(
67
)
2x-97=34.2
(
68
)
3.4x-48=26.8
(
69
)
42x+25x=134
(
70
)
1.5(x+1.6)=3.6
(
71
)
2(x-3)=5.8
(
72
)
65x+7=137
(
73) 9x+4
X
2.5
=
91
(74) 4.2 x+2.5x
=
134
(75) 10.5x+6.5x=51
3 19
(76) 89x-43x=9.2
(77) 5x-45=100
(78) 1.2x-0.5x=6.3
(79) 23.4=2x
(80)
4x-x=48.6
(81) 4.5x-x=28
(82)X-5.7=2.15
(
83
)
5X-2X=18
(
84
)
3X+0.7=7
(
85) 3.5
X
2= 4.2+x
(86) 26
X
1.5= 2x+10
(87) 0.5
X
16
—
16 X0.2=4x
(88) 13 9.25
—
X=0.403
(89) 18.9 *0. 3
(90)
23x=14x
+
27
(91) x
+
14x=75
(92
)
95
—
5x
=
80
(
93
)
1.8 +6x
=
54
(
94) 6.7x
—
60.3
=
6.7
(95) 9
+
4x
=
53
(96)
2x+8=16
(97) 20x-14x=24
(98) x+7x=8
4 19
(99)x-3x=6
9
(111)3x+7=28
(100
)
6x-8=4
(
101
)
(
102
)
(
103)
(104)
(105
)
(
106
)
(
107
)
(
108
)
(
109
)
(
110
)
5x+x=9
8x-8=6x
4
4
5
x=20
2x-6=12
7x+7=14
6x-6=0
5x+6=11
2x-8=10
2.5x-8=4
x-
一
3
7
4
=7
(112) 3x-7=26
(113) 9x-x=16
(114) 24x+x=50
(115) 1.2x-8=4
(116)
3x-8=31
(117) 6x+6=12
(118) 3x-3=3
(119) 5x-3x=4
(120) 2x+16=19
(121)
5x+8=19
(122) 14-6x=8
5 19
(123) 15+6x=27
(124) 5-8x=4
(125) 7x+8=15
(126) 9-2x=1
(127)
4+5x=9
(128) 10-x=8
(129) 8x+9=17
(130) 9+6x=15
(131) x+9x=4+7
(132)
2x+9=17
(133) 8-4x=6
(134) 6x-7=28
(135) 7x-9=20
(136) x-56=1
(137)
8-7x=1
(138)x-30=12
(139) 6x-2
仁
21
(140) 6x-3=6
(141) 9x=18
(142)
4x-18=14
(143) 5x+9=11
(144) 17-2x=11
(145) x+4+8=23
6 19
(146) 7x-12=9
(147) X-5.7=2.15
(148) 5X-2X=18
(149) 3X +0.5=5
(150) 3.5
X
2= 4 x
(151) 26
X
1.5= 2x
(152) 0.5
X
16
—
16
X0.
仁
4x
(153) 9.26
—
X=0.402
(154) 36.9
空=
0.3
(155) X -X).5=2.6
(156) 93
—
5x
=
80
(157) 180-6x
=
54
(158) 9
+
4x
=
40
(159) 0.2x
—
0.4
+
0.5
=
3.7
(160) 9.4x
—
0.4x
=
16.2
(161) 92
—
4x
=
20
(162) 7x +6=1.4
(163) 16x
+
34x=1
(164) 18x
—
14x=12
(165) 3 x
—
42
+
14=15
(166) 12
+
4x=56
(167) 22
—
14x=12
(168) X+8.3=10.7
7 19
(169) 5x
=
30
(170)
x-5.6=9.4
(171)
x +0.8=90
(172) 3x
-
8
=
16
(173) 3x+9=27
(174) 5.3+7x=7.4
(175) 3x +5=4.8
(176) X-0.8X=6
(177) 12x+8x=4.8
(178) 7(x-2)=49
(179) 4 X8+2x=36
(180)
(x-2)
+
3=7
(181) x
廿
+9=21
(182)(300-x)
廿
=30
(183) 91 -x
=
1.3
(184) 41-3x=17
8 19
五年级解方程180题答案
(1) (0.5+x)+x=9.8 -2
0.5+2x=4.9
0.5+2x-0.5=4.9-0.5
2x=4.4
2x
-
2=4.4 -2
X=2.2
(2)
2(X+X+0.5)=9.8
2x+2x+
仁
9.8
4x+1-1=9.8-1
4x=8.8
4x
-
4=8.8
—
4
X=2.2
(3) 25000+x=6x
25000+x-x=6x-x
5x=25000
5x
廿
=25000 -5
X=5000
(4)
3200=440+5X+X
6
X
+440=3200
6x+450-450=3200-440
6x=2760
6x -5=2760
-5
X=460
(5) X-0.8X=6
0.2x=6
0.2x
+0.2=6 -0.2
X=30
(6) 12x-8x=4.8
4x=4.8
4x
-
4=4.8
-
4
X=1.2
(7)
7.5+2X=15
2x+7.5-7.5=15-7.5
2x=7.5
2x
-2=7.5 -2
X=3.75
(8) 1.2x=81.6
1.2x
-
1.2=81.6
-
1.2
X=68
(9)
x+5.6=9.4
X+5.6-5.6=9.4-5.6
X=3.8
(10) x-0.7x=3.6
0.3x=3.6
0.3x *0.3=3.6
-
).3
X=12
(11) 91
-
x
=
1.3
91
-
x
X
x=1.3
X
x
1.3x=91
1.3x
-
1.3=91
-
1.3
X=70
(12) X+8.3=10.7
X+8.3-8.3=10.7-8.3
X=2.4
(13) 15x
=
3
15x
-
15=3
-
15
X=0.2
(14) 3x
-
8
=
16
3x-8+8=16+8
3x=24
3x
-
3=24
-
3
X=8
(15) 3x+9=27
3x+9-9=27-9
3x=18
3x
-
3=18
-
3
3x=6
(16) 18(x-2)=270
18x-36=270
18
X
-36+36=270+36
18x=306
18x
-
18=306
-
18
X=17
(17) 12x=300-4x
12x+4x=300-4x+4x
16x=300
16x
-
16=300
-
16
9 19
X=18.75
(18) 7x+5.3=7.4
7x+5.3-5.3=7.4-5.3
7x=2.1
7x
-
7=2.1
-
7
X=0.3
(19)
3x
廿
=4.8
3x
廿
X5=4.8
X
5
3x=24
3x
-
3=24
-
3
X=8
(20) 30
£+25=85
30
+
x+25-25=85-25
30
-c=60
30
-
x
X
x=60
X
x
30=60x
60x
北
0=30
北
0
X=0.5
(21) 1.4 X8-2x=6
11.2-2x+2x=6+2x
11.2=6+2x
2x+6-6=11.2-6
2x=5.2
2x +2=5.2 —2
X=2.6
(22)
6x-12.8
X
3=0.06
6x-38.4=0.06
6x=38.46
6x
北
=38.46
北
X=6.41
(23) 410-3x=170
410-3x+3x=170+3x
170+3x=410
3x+170-170=410-170
3x=240
3x
-
3=240
-
3
X=80
(24)
3(x+0.5)=21
3x+1.5=21
3x+1.5-1.5=21-1.5
3x=19.5
3x
-
3=19.5
-
3
X=6.5
(25)
0.5x+8=43
0.5x+8-8=43-8
0.5x=35
0.5x *0.5=35
-
0.5
X=70
(26) 6x-3x=18
3x=18
3x
-
3=18
-
3
X=6
(27) 7(6.5+x)=87.5
7x+45.5=87.5
7x+45.5-45.5=87.5-45.5
7x=42
7x -7=42 —
X=6
(28)
0.273
-
x=0.35
x=0.273 -0.35
X=0.78
(29)
1.8x=0.972
1.8x
-
1.8=0.972
-
1.8
X=0.54
(30) x -0.756=90
x -0.756
X0.756=90 X0.756
X=68.04
(31)
0.1(x+6)=3.3 X0.4
0.1x+0.6=1.32
0.1x+0.6-0.6=1.32-0.6
0.1x=0.72
0.1x -0.1=0.72 -0.1
X=7.2
(32)
(27.5-3.5)
-
x=4
24
-
x=4
x=24
-
4
X=6
(33) 9x-40=5
9x-40+40=5+40
9x=45
9x
-
9=45 +9
X=5
(34)
x
-
5+9=21
x
-
5+9-9=21-9
x-5=12
10
19
x
廿
X5=12 X5
X=60
(35) 48-27+5x=31
5x+21-2
仁
31-21
5x=10
5x -5=10
廿
X=2
(36)
10.5+x+21=56
x+31.5-31.5=56-31.5
x=24.5
(37) x+2x+18=78
3x+18-18=78-18
3x=60
3x
-
3=60
—
3
X=20
(38)
(200-x) -5=30
(200-x) -5 X5=30
X
5
200-x=150
200-x+x=150+x
150+x=200
X+150-150=200-150
X=50
(39)
(x-140)
-
70=4
(x-140)
-
70
X
70=4
X
70
X-140=280
X-140+140=280+140
X=420
(
40
)
20-9x=2
9x=20-2
9x=18
9x +9=18 +9
X=2
(41) x+19.8=25.8
X+19.8-19.8=25.8-19.8
X=6
(42
)
5.6x=33.6
5.6x
弋
.6=33.6 *5.6
X=6
(
43
)
9.8-x=3.8
9.8-x+x=3.8+x
3.8+x=9.8
X=9.8-3.8
X=6
(
44
)
75.6
-
x=12.6
X=75.6
-
12.6
X=6
(
45
)
5x+12.5=32.3
5x+12.5-12.5=32.3-12.5
5x=19.8
5x
廿
=19.8 -5
X=3.96
(
46
)
5(x+8)=102
5x+40=102
5x+40-40=102-40
5x=62
5x
-
H
5=62
廿
X=12.4
(
47
)
x+3x+10=70
4x+10=70
4x+10-10=70-10
4x=60
4x
—
4=60
—
4
X=15
(
48
)
3(x+3)=50-x+3
3x+9=53-x
3x+x+9-9=53-x+x-9
4x=44
4x
—
4=44
—
4
X=11
(
49
)
5x+15=60
5x+15-15=60-15
5x=45
5x
+5=45
—
5
X=9
(
50
)
3.5-5x=2
3.5-5x+5x=2+5x
5x+2=3.5
5x+2-2=3.5-2
5x=1.5
5x
廿
=1.5 -5
X=0.3
(
51
)
0.3
X
7+4x=12.5
4x+2.1= 12.5
11
19
4x+2.1-2.1=12.5-2.1
4x=10.4
4x
-^
4=10.4
+
4
X=2.6
(
52
)
x
+
1.5-1.25=0.75
x
+
1.5-1.25+1.25=0.75+1.25
x
+
1.5=2
x
+
1.5 X1.5=2
X
1.5
X=3
(
53
)
4x-1.3
X6=2.6
4x-1.3 X6+1.3 X6=2.6+1.3 X6
4x=10.4
4x
+
4=10.4
+
4
X=2.6
(
54
)
6x+12.8=15.8
6x+12.8-12.8=15.8-12.8
6x=3
6x +5=3
+
6
X=0.5
(
55
)
150
X
2+3x=690
3x+300=690
3x+300-300=690-300
3x=390
3x
+
3=390
+
3
X=130
(
56
)
2x-20=4
2x-20+20=4+20
2x=24
2x +2=24 +2
X=12
(
57
)
3x+6=18
3x+6-6=18-6
3x=12
3x
+
3=12
+
3
X=4
(
58
)
2(2.8+x)=10.4
5.6+2x=10.4
2x+5.6-5.6=10.4-5.6
2x=4.8
2x +2=4.8
+2
X=2.4
(
59
)
(x-3) -2=7.5
(
x-3
) +
2X2=7.5
X
2
X-3=15
X=18
(
60
)
13.2x+9x=33.3
22.2x=33.3
22.2x
-22.2=33.3 -22.2
X=1.5
(
61
)
3x=x+100
3x-x=x-x+100
2x=100
2x
+2=100
+
2
X=50
(
62
)
x+4.8=7.2
X=7.2-4.8
X=2.4
(
63
)
6x+18=48
6x+18-18=48-18
6x=30
6x +5=30 +5
x=5
(
64
)
3(x+2.1)=10.5
3x+6.3=10.5
3x=10.5-6.3
3x=4.2
3x
+
3=4.2
+
3
X=1.4
(
65
)
12x-9x=8.7
3x=8.7
3x
+
3=8.7
+
3
X=2.9
(
66
)
13(x+5)=169
13x+65=169
13x+65-65=169-65
13x=104
13x
+
13=104
+
13
X=8
(
67
)
2x-97=34.2
2x-97+97=34.2+97
2x=131.2
2x +2=131.2
+
2
X=65.6
(
68
)
3.4x-48=26.8
12
19
3.4
X
-48+48=26.8+48
3.4x=74.8
3.4
X
+
3.4=74.8
-
3.4
X=22
(69)
42
X
+25
X
=134
67
X
=134
67
X
+67=134
+
67
X=2
(70)
1.5(x+1.6)=3.6
1.5
X
+2.4=3.6
1.5
X
=3.6-2.4
1.5
X
=1.2
1.5
X
+
1.5=1.2
+
1.5
X=0.8
(
71
)
2(
X
-3)=5.8
2
X
-6=5.8
2
X
-6+6=5.8+6
2
X
=11.8
2
X
+2=11.8 +2
X=5.9
(72)
65
X
+7=137
65
X
+7-
7=137-7
65
X
=130
65
X
北
5=130
北
5
X=2
(73)
9
X
+4
X
2.5
=
91
9
X
+10=91
9
X
+10-10=91-10
9
X
=81
9
X
+
9=81 +9
X=9
4.2
X
+2.5
X
=
134
6.7
X
=134
6.7
X
+6.7=134
+6.7
X=20
10.5
X
+6.5
X
=51
17
X
=51
17
X
+
17=51 -17
X=3
89
X
-43
X
=9.2
46
X
=9.2
46
X
+
46=9.2
+
46
X=0.2
(77)
5
X
-45=100
5
X
-45+45=100+45
5
X
=145
5
X
+5=145
+
5
X=29
(78)
1.2
X
-0.5
X
=6.3
0.7
X
=6.3
0.7
X
-0.7=6.3
-0.7
X=9
(79)
23.4=2
X
2
X
+2=23.4 +2
X=11.7
(80)
4
X
-
X
=48.6
3
X
=48.6
3
X
+
3=48.6
+
3
X=16.2
(81)
4.5
X
-
X
=28
3.5
X
=28
3.5
X
+
3.5=28
+
3.5
X=8
(82
)
X-5.7=2.15
X=5.7+2.15
X=7.85
(83) 5X-2X=18
3
X
=18
3
X
+
3=18
+
3
X=6
(84) 3X+0.7=7
3
X
+0.7-0.7=7-0.7
3
X
=6.3
3
X
+
3=6.3
+
3
X=2.1
(85) 3.5
X
2=
4.2+
X
4.2+
X
=7
X=7-4.2
X=2.8
(86)
26
X
1.5=
2
X
+10
2
X
+10=39
2
X
+10-10=39-10
2
X
=29
2
X
+2=29
+
2
X=14.5
(87) 0.5
X
16
—
16
X0.2=4
X
(74)
(75)
(76)
13
19
4x=4.8
4x
+
4=4.8
*
4
X=1.2
(88) 13
9.25
—
X=0.403
X=139.25-0.403
X=138.847
(89) 18.9
+
X=0. 3
X=18.9 -0.3
X=63
(90) 23x=14x
+
27
23x-14x=14x-14x+27
9x=27
9x
+9=27 *9
X=3
(91) x
+
14x=75
15x=75
15x
+
15=75
+
15
X=5
(92
)
95
—
5x
=
80
95-5x+5x=80+5x
5x+80=95
5x+80-80=95-
80
5x=15
X=3
(
93
)
1.8 +6x
=
54
6x=54-1.8
6x=52.2
6x
北
=52.2
-
H
6
X=8.7
(94) 6.7x
—
60.3
=
6.7
6.7x=60.3+6.7
6.7x=67
6.7x
-
H
6.7=67
北
.7
X=10
(95)
9
+
4x
=
53
4x=53-9
4x=44
4x
+
4=44
+
4
X=11
(96)
2x+8=16
2x=16-8
(97) 20x-14x=24
6x=24
6x *6=24 *6
X=4
(98) x+7x=8
8x=8
X=1
(99) 9x-3x=6
6x=6
X=1
(100
)
6x-8=4 6x-
8+8=4+8
6x=12
X=2
(
101
)
5x+x=9
6x=9
6x +5=9 +5
x=1.5
(102)
8x-8=6x
8x-8+8=6x+8
8x-6x=6x-6x+8
2x=8
2x
+2=8
+
2
X=4
4
(103)
5
x=20
4 4 4
5
_ x +
5
— =20
5
+
X=25
(104) 2x-6=12
2x-6+6=12+6
2x=18
2x
+
2=18 +2
X=9
(105
)
7x+7=14
7x+7-7=14-7
7x=7
7x
+
7=7
+
7
X=1
(106)
6x-6=0
6x-6+6=0+6
6x=6
X=1
14
19
2x=8
2x
+2=8
+
2
X=4
15
19
5x+6-6=11-6
5x=5
X=1
(
108
)
2x-8=10
2x-8+8=10+8
2x=18
X=9
(
109
)
2.5x-8=4
2.5x-8+8=4+8
2.5x=12
2.5x -2.5=12 -2.5
X=4.8
3
(
110
)
x- — =7
4
X- —
3
+ —
3
=7+ -
3
4 4 4
X=7.75
(
111
)
3x+7=28
3x+7-7=28-7
3x=21
3x
-
3=21
-
3
X=7
(112) 3x-7=26
3x-7+7=26+7
3x=33
3x
-
3=33
—
3
X=11
(113) 9x-x=16
8x=16
8x+8=16
-
8
X=2
(114) 24x+x=50
25x=50
25x
-
25=50 -25
X=2
(115) 1.2x-8=4
1.2x-8+8=4+8
1.2x=12
1.2x
-
1.2=12
-
1.2
X=10
(116) 3x-8=31
3x-8+8=31+8
3x=39
X=13
(117) 6x+6=12 6x+6-
6=12-6
6x=6
X=1
(118) 3x-3=3
3x-3+3=3+3
3x=6
3x
-
3=6
-
3
X=2
(119) 5x-3x=4
2x=4
2x +2=4 +2
X=2
(120) 2x+16=19
2x+16-16=19-16
2x=3
2x +2=3 +2
X=1.5
(121) 5x+8=19
5x+8-8=19-8
5x=11 5x -
5=11 -5 X=2.2
(122) 14-6x=8 14-
6x+6x=8+6x
6x+8-8=14-8
6x=6
X=1
(123)
15+6x=27
6x+15-15=27-15
6x=12
6x
北
=12
北
X=2
(124) 5-8x=4
5-8x+8x=4+8x
8x+4-4=5-4
8x=1
8x
+8=1
-
8
X=0.125
(125) 7x+8=15
7x+8-8=15-8
7x=7
X=1
16
19
3x
-
3=39
-
3
17
19
(126) 9-2x=1
9-2x+2x=1+2x
2x+1-
仁
9-1
2x=8
2x
+2=8 +2
X=4
(127) 4+5x=9 5x+4-4=9-4
5x=5
X=1
(128) 10-x=8
X=10-8
X=2
(129) 8x+9=17 8x+9-9=17-9
8x=8
X=1
(130) 9+6x=15 6x+9-9=15-9
6x=6
X=1
(131) x+9x=4+7
10x=11
10x
+
10=11
+
10
X=1.1
(132)
2x+9=17 2x+9-9=17-9
2x=8
2x +2=8 +2
X=4
(133) 8-4x=6 8-4x+4x=6+4x
4x+6-6=8-6
4x=2
4x +2=2
+
4
X=0.5
(134) 6x-7=28 6x-7+7=28+7
6x=36
6x *6=36
+
6
X=6
(135) 7x-9=20
7x-9+9=8+20
7x=28
7x
+
7=28
+
7
X=4
(136) x-56=1
X=56+1
X=57
(137) 8-7x=1
8-7x+7x=1+7x
7x+1-1=8-1
7x=7
X=1
(138) x-30=12
X-30+30=12+30
X=42
(139) 6x-21=21
6x-21+21=21+21
6x=42
6x *6=42 *6
X=7
(140) 6x-3=6
6x-3+3=6+3
6x=9
6x +5=9
+
5
X=1.5
(141) 9x=18
9x +9=18
+
9
X=2
(142) 4x-18=14
4x-
18+18=14+18
4x=32
4x
+
4=32
+
4
X=8
(143) 5x+9=11
5x+9-9=11-9
5x=2
5x -5=2
廿
X=0.4
(144) 17-2x=11
17-2x+2x=11+2x
2x+11-11=17-11
2x=6
18
19
(145) x+4+8=23
X+12=23
X=23-12
X=11
(146) 7x-12=9
7x-12+12=9+12
7x=21
7x
-
7=21
-
7
X=3
(147) X-5.7=2.15
x=5.7+2.15
X=7.85
(148) 5X-2X=18
3x=18
3x
-
3=18
-
3
X=6
(149) 3X +0.5=5
3x+0.5-0.5=5-0.5
3x=4.5
3x
-
3=4.5
—
3
X=1.5
(150) 3.5 X2= 4 x
4x=7
4x
-
4=7
-
4
X=1.75
(151) 26
X
1.5= 2x
2x=39
2x +2=39 +2
X=18
(152) 0.5
X
16
—
16
X0.1=4x
4x=6.4
4x
-
4=6.4
-
4
X=1.6
(153) 9.26
—
X=0.402
X=9.26-0.402
X=8.858
(154)
36.9
-
X=0.3
X=36.9
-
3.3
X=123
(155) X -0.5=2.6
X=0.5
X
2.6
X=1.3
(156) 93
—
5x
=
80
93-5X+5X=80+5X
5X+80-80=93-80
5X=13
5X
廿
=13
-5
X=2.6
(157) 180-6x
=
54
180-6X+6X=54+6X
6X+54-54=180-54
6X=126
6X
北
=126
北
X=21
(158) 9
+
4x
=
40
4X+9-9=40-9
4X=31
4X
-
4=31
-
4
X=7.75
(159) 0.2x
—
0.4
+
0.5
=
3.7
0.2X-0.5+0.5-0.4+0.4=3.7-0.5+0.4
0.2X=3.6
0.2X -0.2=3.6 -0.2
X=18
(160) 9.4x
—
0.4x
=
16.2
9X=16.2
9X
-9=16.2 -9
X=1.8
(161) 92
—
4x
=
20 92-
4X+4X=20+4X 4X+20-
20=92-20
4X=72
4X
-
4=72
-
4
(162) X=18
(163) 7x
北
=1.4
7x
+6 X6=1.4 X6
7X=8.4
7X -7=8.4
-
7
X=1.2
(163) 16x
+
34x=1
50X=1
50X -50=1
廿
0
X=0.02
(164) 18x
—
14x=12
4X=12
4X
-
4=12
-
4
X=3
19
19
(165) 3 x
—
42
-
14=15
20
19
3X-3=15 3X-
3+3=15+3 3X=18
3X
-
3=18
-
3
X=6
(166)
12
+
4x=56 4X+12-
12=56-12
4X=44
4X
-
4=44
-
4
X=11
(167)
22
—
14x=12
22-14X+14X=12+14X
14X+12-12=54-12
14X=42
14X
-
14=42
-
14
X=3
(168) X+8.3=10.7
X=10.7-8.3
X=2.4
(169) 5x
=
30
5X *5=30 —5
X=6
(170) x-5.6=9.4
X=5.6+9.4
X=15
(171) x
-
0.8=90
X=0.8 X90
X=72
(172) 3x
—
8
=
16
3X-8+8=16+8
3X=24
3X
-
3=24
-
3
X=8
(173) 3x+9=27
3X+9-9=27-9
3X=18
3X
-
3=18
-
3
X=6
(174) 5.3+7x=7.4
7X+5.3-5.3=7.4-5.3
7X=2.1
(175) 3x
-5=4.8
7X
-
7=2.1
-
7
X=0.3
3X=4.8 X5
3X=24
3X
-
3=24
-
3
X=8
(176)
X-0.8X=6
0.2X=6
0.2X -0.2=6 -0.2
X=30
(177) 12x+8x=4.8
20X=4.8
20X
-
20=4.8 -20
X=24
(178) 7(x-2)=49
7X-14=49
7X-14+14=49+14
7X=63
7X
-
7=63
-
7
X=9
(179) 4
X8+2x=36
2X+32=36
2X+32-32=36-32
2X=4
2X -2=4 -2
X=2
(180) (x-2)
-
3=7
X-2=3
X
7
X-2=21
X=23
(181) x -5+9=21
X -5=21-9
X
-5=12
X=12 X5
X=60
(182) (300-x) -5=30
300-X=30 X5
300-X=150
X=300-150
X=150
(183) 91
-
x
=
1.3
X=91
-
1.3
X=70
(184)
41-3x=17
41-3X+3X=17+3X
3X+17-17=41-17
21
19
3X=24
3X
+
3=24
-
3
X=8
22
19