题目内容
解方程.
2x÷
|
|
(1)2x÷
=
,
2x÷
×
=
×
,
2x÷2=
÷2,
x=
;
(2)
x-
x=7,
x÷
=7÷
,
x=20.
| 1 |
| 4 |
| 4 |
| 3 |
2x÷
| 1 |
| 4 |
| 1 |
| 4 |
| 4 |
| 3 |
| 1 |
| 4 |
2x÷2=
| 1 |
| 3 |
x=
| 1 |
| 6 |
(2)
| 3 |
| 4 |
| 2 |
| 5 |
| 7 |
| 20 |
| 7 |
| 20 |
| 7 |
| 20 |
x=20.
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