题目内容
解方程.
| x÷
|
|
①
x=
,
×
x=
×
,
x=
;
②x÷
=
,
3x=
,
3x×
=
×
,
x=
;
③
x-18=6,
x-18+18=6+18,
x=24,
x×
=24×
,
x=30.
| 7 |
| 8 |
| 7 |
| 24 |
| 7 |
| 8 |
| 8 |
| 7 |
| 7 |
| 24 |
| 8 |
| 7 |
x=
| 1 |
| 3 |
②x÷
| 1 |
| 3 |
| 5 |
| 6 |
3x=
| 5 |
| 6 |
3x×
| 1 |
| 3 |
| 5 |
| 6 |
| 1 |
| 3 |
x=
| 5 |
| 18 |
③
| 4 |
| 5 |
| 4 |
| 5 |
| 4 |
| 5 |
| 4 |
| 5 |
| 5 |
| 4 |
| 5 |
| 4 |
x=30.
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