一元一次方程50道练习题(含答案)
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一元一次方程50道练习题(含答案)
1
x4
;
2
(2)
0.8x0.10.5x0.7
;
15
(3)
x42x3x
;
22
3x17x
(4);
36
(1)
2x
1
(5)
x12x3x1
1
;
463
32123
x
;
23232
11x1103x
)](2x)
(7)
2[1
(x
3323
1111
(8)
(2x3)(2x4)(2x5
)(2x6)
.
2345
(6)
[(x1)2]
(9)5x+2=7x-8;
(10)
7
2x1
3
4x1
2
3x2
10
;
5x17
;
63
712
(12)
2y1
12y
2y1
;
223
2x1x21
;
(13)
662
(11)
(14)
3
2
2x12x2
;
2
3
<
br>(15)
1
x1
3x
x<
br>
1
;
2
32
2
12
341
432
1
4
3
x1
;
2
(16)
[(x)8]
512
7x12(x)8(6x9)
323
(17);
x
(18)
218xx
2
69
;
2
x
5
;
(x1)30%(100x)25%
(19)
23x5xx
2
234
(20). <
br>(21)
1
1
1
1
x1
3
5
1
6
4
3
2
(22)2(2x-1)-4(4x-1)-5(2x+1)-19=0
(23)
3x13x5x41
12
3462
0.4x0.90.1x0.50.030.02x
(24)
0.50.20.03
32112x
(25)
[(x1)2]2
23423
(26)2{3[4(5x-1)-8]-20}-7=1
(27)2(0.3x-4)-5(0.2x+3)=9
(28)2[(x+3)-2(x+1)]-5=0
2(x3)
x2x2
16
326
x3x4
(30)
1.6
0.150.2
111x2
(31)
{[(4)6]8}1
9753
(29)3x-
(32)3x=2x+5
(33)2y+3=y-1
(34)7y=4-3y
(35)-
2
1
y
=
3
5
(36)10x+7=12x-5-3x
(37)8x―4+2x= 4x―3
(38).2(3x+4)=6-5(x-7)
(39).
x2x45x12
1
236
111
(40)
x[x(x)]2
222
2(2x1)0.220x
2.53.5
(41)
0.010.2
x2x34x
2
35
(42)
(x5)
(43)
4x1.55x0.81.2x
3
0.50.20.1
1xx2
(44).
x-
3
=
6
-1
0.4y0.9y50.30.2y
(45).
0.5
-
2
=
0.3
(46) 3(x+2)
-
11
3
(2x-3)=2(2x-3)-
2
(x+2)
(47).
1111
3
{
3
[
3
(3
x-2)-2]}-2=0
(48)、5(y+8)―5 = 4(2y―7);
(49)、
2
3
x
3
2
(1
3x<
br>3
)
23x
6
;
(50)、
1.88x1.2
1.33x
2
5x0.4
0.3
;
(1)x =2;(2)x =—2;(3)x =7;(4)x =1;
(5)x =—5;(6)x =
3
121
3
;(7)x
=
7
;(8)x =
2
.
(9)x=5;(10)x
71
8
;(11)x=3;(12)
y
2
; <
br>(13)x=0;(14)x=6;(15)
x
61
7
;(16)<
br>x7
4
.
x
8
9
x
3
x
22530
506
x
16
17.
18.
5
19
357
20
25
21. x=8
22.x=-1 23.x=-3 24.x=9
25.x=
18
5
26.x=1 27、x=-80
28、x=-
3
2
29、
52
9
30、24.96 31、x=1
32)x=5 33)y=-4
34)y=
25
5
35)y=-
6
36)x=-12
38.x=3 39.x=-
7172
2
40.x=
6
41.
x
5
(42)
x
=6 ; (43)
x
=-2 ;
37)x=
1
6
2
45.
y9
46.
x12
47.
x=186
7
11
48、 y = 21 49、x=;
50、x=;
210
44.
x