题目内容
| 解方程. ①9.5x-5.3x=12.6 | ②5x-4.2=8.8 | ③
| ④X÷
|
①9.5x-5.3x=12.6,
4.2x=12.6,
4.2x÷4.2=12.6÷4.2,
x=3;
②5x-4.2=8.8,
5x-4.2+4.2=8.8+4.2,
5x=13,
5x÷5=13÷5,
x=2.6;
③
| 7 |
| 8 |
| 21 |
| 32 |
| 7 |
| 8 |
| 7 |
| 8 |
| 21 |
| 32 |
| 7 |
| 8 |
x=
| 3 |
| 4 |
④X÷
| 3 |
| 4 |
| 15 |
| 16 |
X÷
| 3 |
| 4 |
| 3 |
| 4 |
| 15 |
| 16 |
| 3 |
| 4 |
X=
| 45 |
| 64 |
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