七年级上:一元一次方程50道练习题(含答案)
图案-poetry
一元一次方程50道练习题
(1)
2x1
(3)
1
x4
;
(2)
0.8x0.10.5x0.7
2
153x17x
;
x42x3x
;
(4)
2236
(5)
x12x3x1
32123
;
(6)
[(x1)2]x
1
23232
463
(7)
2[1
11x1103x1
111
(x)](2x)
(8)
(2x3)(2x4)(2x5)
(2x6)
33232345
(9)5x+2=7x-8;
(10)
7
2x1
3
4x1
2
3x2
10
(11)
5x17
;
63
(12)
7
2y1
1
12y
2
2y1
;
223
(13)
3<
br>
2
2x1x21
;
(14)
2x1
2
x2
662
(
15)
1
x1
3x
x
2
3
2
2
1
12
;
7x12(
5
x
1
)8
2
(6x9
(17)
323
)
(x
1)30%(100x)25%
2
(19)
5
x
;
(21)
1
1
1
6
1
x1
<
br>
3
5
1
4
3
2
2
3
16)
3
4
[
4
3
(
1
2
x
1
4
)8
]
3
2
x1
x
218x
x
2
(18)
69
23x
5x
x
4
2
(20)<
br>23
(22)2(2x-1)-4(4x-1)-5(2x+1)-19=0
(
(23)
3x13x
5x410.4x0.90.1x0.50.030.02x
12
(24)
3462
(25)
3
[2
(
1
x1)2]2
1
2342
2x
3
(27)
2(0.3x-4)-5(0.2x+3)=9
(29)3x-
2(x3)
16
x
2
2
x2
36
(31)
1
9
{
1
7
[
1<
br>5
(
x2
3
4)6]8}1
0.50.20.03
(26)2{3[4(5x-1)-8]-20}-7=1
(28)2[(x+3)-2(x+1)]-5=0
(30)
x3
x4
0.150.2
1.6
(32)3x=2x+5 (33)2y+3=y-1
(34)7y=4-3y
(35)-
2
1
y
=
(36)10x+7=12x-5-3x
3
5
(37)8x―4+2x= 4x―3
(38).2(3x+4)=6-5(x-7)
(39).
x2x45x12
2
3
1
6
(41)
2(2x1)
0.01
2.5
0.22
0x
0.2
3.5
(43)
4x1.5
0.5
5x0.8
0.2
1.2x
0.1
3
(40)
x
1
2
[
x
1
2
(x
1
2
)]2
(42)
(x5)
x2x34x
2
3
<
br>5
(44).
x-
1xx2
3
=
6
-1
0.4y0.9y50.30.2y
(45)
0.5
-
2
=
0.3
11
(46)
3(x+2)-
3
(2x-3)=2(2x-3)-
2
(x+2)
1111
(47)
3
{
3
[
3
(
3
x-2)-2]}-2=0
(48) 5(y+8)―5 = 4(2y―7);
(49)、
233x23x1.88x1.33x5x0.4
x(1)
;
(50)、;
32361.220.3
(1)x =2;
(2)x =—2; (3)x =7; (4)x =1; (5)x =—5; (6)x
=
3
(7)x =
1
;
3
271
1
; (8)x =
. (9)x=5;
(10)
x
; (11)x=3; (12)
y
;
7
2
82
(13)x=0; (14)x=6;
(15)
x
6
7
;
(16)
x7
1
4
.
x
8
17.
9
x
3
x
2253
0
506
x
16
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=
2
5
35)y=-
51
6
36)x=-12 37)x=
6
38.x=3
39.x=-
7
2
40.x=
17
6
41.
x
2
5
42、
x
=6 ;
43、
x
=-2
44.
x
2
7
45.
y9
46.
x12
47. x=186
48、 y = 21
49、x=
11
2
; 50、x=
10
;
;
P
山有木兮木有枝,心悦君兮君不知。____佚名《越人歌》