题目内容
解下列方程.
(1)x×
|
(2)9+
|
(1)x×
=
,
x×
×
=
×
,
x=
;
(2)9+
x=21,
9+
x-9=21-9,
x=12,
x×
=12×
,
x=16;
| 3 |
| 5 |
| 4 |
| 5 |
x×
| 3 |
| 5 |
| 5 |
| 3 |
| 4 |
| 5 |
| 5 |
| 3 |
x=
| 4 |
| 3 |
(2)9+
| 3 |
| 4 |
9+
| 3 |
| 4 |
| 3 |
| 4 |
| 3 |
| 4 |
| 4 |
| 3 |
| 4 |
| 3 |
x=16;
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