一元一次方程的解法练习题
一尺一打一字-前门大碗茶
解一元一次方程的练习题
(1)2x+5=5x-7
(2) 4-3(2-x)=5x
(3)3(x-2)=2-5(x-2) (4)
2(x+3)-5(1-x)=3(x-1)
(5)
3(x1)2(x2)2x3
(7)
x
2
=3x-1
(8)
(9)
1
3
x1
2
1
(11)
31.2x
4
5
x12
(6)
3(x2)1x(2x1)
2x-1x+2
3
=
2
+1
(10)
x8
3
x
(12 )
31
4
x0.4
2
x0.3
(13)
x1
1113x14x2
xxx
(14)
1
24825
xx111
(15)
1
(16)
x12x
25
(17)
3y12
4
2
5y7
3
(19)
1m
2
33m
4
1
(21)
x
1
x
3
x2
6
1
23
(18)
5
3
6x
7
2
x1
(20)
y
y1y
2
2
2
5
(22)
3xx8
2
3
1
(23)
11x2x1
3
(x-3)=2-(x-3) (24)
22
(25)
x1
0.2
x3
0.01
3
(26)
(27)
x2
4
2x3
6
1
(29)
3
2
4
<
br>
x
1
3
2
3
2x
0.20.5
y
218yy
6
9
2
28)
x1x24x
3
6
2
(30)
1
2
[x
12
2
(x1)]3
(x1)
(
(31)
131x
4
3x
(1x)(2)2
(32)
(1)3
2x3
4234
(33)
2x139
(35)
x
1
2
[x
1
3
(x6)]
1
6
(x6)
3
3
22
(34)
7x12
<
br>5
3
x
1
2
2
8
3
(6x9)
(36)
3
2
2
3
1
4
x
1
12
2
2
2
3
x