题目内容
解方程
(1)2x+5=5x-7
(2)3(x-2)=2-5(x-2)
(3)
-
=1
(4)
[
(
x-2)-6]=1
(1)2x+5=5x-7
(2)3(x-2)=2-5(x-2)
(3)
| y+2 |
| 4 |
| 2y-3 |
| 6 |
(4)
| 4 |
| 3 |
| 3 |
| 4 |
| 1 |
| 5 |
(1)2x-5x=-5-7,
-3x=-12,
x=4;
(2)3x-6=2-5x+10,
8x=18,
x=
;
(3)
-
=1,
3(y+2)-2(2y-3)=12,
3y+6-4y+6=12,
-y=0,
y=0;
(4)
x-2-8=1,
x=11,
x=55.
-3x=-12,
x=4;
(2)3x-6=2-5x+10,
8x=18,
x=
| 9 |
| 4 |
(3)
| y+2 |
| 4 |
| 2y-3 |
| 6 |
3(y+2)-2(2y-3)=12,
3y+6-4y+6=12,
-y=0,
y=0;
(4)
| 1 |
| 5 |
| 1 |
| 5 |
x=55.
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