题目内容
解方程(求未知数x).
x+
=
2(3+2x)=42.
x+
| 3 |
| 4 |
| 11 |
| 12 |
2(3+2x)=42.
x+
=
x=
-
,
x=
;
2(3+2x)=42
3+2x=21,
2x=18,
x=9.
| 3 |
| 4 |
| 11 |
| 12 |
x=
| 11 |
| 12 |
| 3 |
| 4 |
x=
| 1 |
| 6 |
2(3+2x)=42
3+2x=21,
2x=18,
x=9.
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