题目内容
| 解方程. (1)x-
| (2)x:
|
(1)x-
x=3,
x=3,
x÷
=3÷
,
x=9;
(2)x:
=2.25:3
,
3
x=
×2.25,
3
x÷3
=
÷3
,
x=
.
| 2 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
x=9;
(2)x:
| 13 |
| 15 |
| 1 |
| 4 |
3
| 1 |
| 4 |
| 13 |
| 15 |
3
| 1 |
| 4 |
| 1 |
| 4 |
| 39 |
| 20 |
| 1 |
| 4 |
x=
| 3 |
| 5 |
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