题目内容
解方程.
| x÷
|
|
(1)
x=
,
x÷
=
÷
,
x=
×
,
x=
;
(2)x÷
=
÷
,
x÷
×
=
×
×
,
x=
;
(3)
x÷
=12,
x÷
×4=12×4,
x=48,
x÷
=48÷
,
x=48×
,
x=72.
| 2 |
| 7 |
| 8 |
| 21 |
| 2 |
| 7 |
| 2 |
| 7 |
| 8 |
| 21 |
| 2 |
| 7 |
x=
| 8 |
| 21 |
| 7 |
| 2 |
x=
| 4 |
| 3 |
(2)x÷
| 6 |
| 35 |
| 26 |
| 45 |
| 13 |
| 25 |
x÷
| 6 |
| 35 |
| 6 |
| 35 |
| 26 |
| 45 |
| 25 |
| 13 |
| 6 |
| 35 |
x=
| 4 |
| 21 |
(3)
| 2 |
| 3 |
| 1 |
| 4 |
| 2 |
| 3 |
| 1 |
| 4 |
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
x=48×
| 3 |
| 2 |
x=72.
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