题目内容
求x:
|
|
3Χ+5Χ=16. |
(1)
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
X-15=279,
X-15+15=279+15,
X=294;
(2)
| 1 |
| 20 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 3 |
| 1 |
| 20 |
| 1 |
| 4 |
| 1 |
| 3 |
| 1 |
| 16 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 16 |
| 1 |
| 3 |
X=
| 3 |
| 16 |
(3)3X+5X=16,
8X=16,
8X÷8=16÷8,
X=2.
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