题目内容
解方程.
2x-
=
x-(
+
)=
.
2x-
| 2 |
| 3 |
| 1 |
| 3 |
x-(
| 1 |
| 4 |
| 1 |
| 5 |
| 1 |
| 20 |
(1)2x-
| 2 |
| 3 |
| 1 |
| 3 |
2x-
| 2 |
| 3 |
| 2 |
| 3 |
| 1 |
| 3 |
| 2 |
| 3 |
2x=1,
2x÷2=1÷2,
x=0.5;
(2)x-(
| 1 |
| 4 |
| 1 |
| 5 |
| 1 |
| 20 |
x-
| 9 |
| 20 |
| 1 |
| 20 |
x-
| 9 |
| 20 |
| 9 |
| 20 |
| 1 |
| 20 |
| 9 |
| 20 |
x=
| 1 |
| 2 |
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