题目内容
解下列方程.
(1)Χ-
|
(2)
|
分析:(1)先计算X-
X=
X,然后等式的两边同时除以
即可;
(2)等式的两边同时乘
,然后等式的两边同时除以
即可.
| 5 |
| 9 |
| 4 |
| 9 |
| 4 |
| 9 |
(2)等式的两边同时乘
| 1 |
| 4 |
| 2 |
| 3 |
解答:解:
(1)Χ-
Χ=
,
X=
,
X÷
=
÷
,
X=
;
(2)
Χ÷
=12,
X÷
×
=12×
,
X=3,
X÷
=3÷
,
X=
.
(1)Χ-
| 5 |
| 9 |
| 8 |
| 15 |
| 4 |
| 9 |
| 8 |
| 15 |
| 4 |
| 9 |
| 4 |
| 9 |
| 8 |
| 15 |
| 4 |
| 9 |
X=
| 6 |
| 5 |
(2)
| 2 |
| 3 |
| 1 |
| 4 |
| 2 |
| 3 |
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
X=
| 9 |
| 2 |
点评:本题主要考查解方程,根据等式的性质进行解答即可.
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