题目内容
解方程.
|
| (x-8)÷
|
(1)
x=
x÷
=
÷
x=
;
(2)
÷x=15
÷x×x=15×x
15x=
15x÷15=
÷15
x=
;
(3)(x-8)÷
=
(x-8)÷
×
=
×
x-8=
x-8+8=
+8
x=9
.
| 9 |
| 8 |
| 7 |
| 6 |
| 9 |
| 8 |
| 9 |
| 8 |
| 7 |
| 6 |
| 9 |
| 8 |
x=
| 28 |
| 27 |
(2)
| 5 |
| 6 |
| 5 |
| 6 |
15x=
| 5 |
| 6 |
15x÷15=
| 5 |
| 6 |
x=
| 1 |
| 18 |
(3)(x-8)÷
| 4 |
| 13 |
| 39 |
| 7 |
(x-8)÷
| 4 |
| 13 |
| 4 |
| 13 |
| 39 |
| 7 |
| 4 |
| 13 |
x-8=
| 12 |
| 7 |
x-8+8=
| 12 |
| 7 |
x=9
| 5 |
| 7 |
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