摘要:21.解方程:3=5x+4
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解方程:
(1)4-3(2一x)=5x;
(2)
-
=1;
(3)
[
(
x-
)-8]=
x;
(4)
-
=2(-x+3).
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(1)4-3(2一x)=5x;
(2)
| 2x+1 |
| 3 |
| 5x-1 |
| 6 |
(3)
| 3 |
| 4 |
| 4 |
| 3 |
| 1 |
| 2 |
| 1 |
| 4 |
| 3 |
| 2 |
(4)
| x |
| 0.5 |
| 0.4x-0.6 |
| 0.2 |