题目内容
| 2 |
| 3 |
| 1 |
| 2 |
x-
| 3 |
| 8 |
| 5 |
| 8 |
| 5 |
| 6 |
| 1 |
| 10 |
| 2 |
| 5 |
分析:(1)根据等式的性质,两边同乘上
即可;
(2)原式可化简为
X=
,再根据等式的性质,两边同乘上
即可;
(3)根据等式的性质,两边同加上
,再同乘上
即可.
| 3 |
| 2 |
(2)原式可化简为
| 5 |
| 8 |
| 5 |
| 8 |
| 8 |
| 5 |
(3)根据等式的性质,两边同加上
| 1 |
| 10 |
| 6 |
| 5 |
解答:解:(1)
X=
X×
=
×
X=
;
(2)X-
X=
X=
X×
=
×
X=1;
(3)
X-
=
X-
+
=
+
X=
X×
=
×
X=
.
| 2 |
| 3 |
| 1 |
| 2 |
| 2 |
| 3 |
| 3 |
| 2 |
| 1 |
| 2 |
| 3 |
| 2 |
X=
| 3 |
| 4 |
(2)X-
| 3 |
| 8 |
| 5 |
| 8 |
| 5 |
| 8 |
| 5 |
| 8 |
| 5 |
| 8 |
| 8 |
| 5 |
| 5 |
| 8 |
| 8 |
| 5 |
X=1;
(3)
| 5 |
| 6 |
| 1 |
| 10 |
| 2 |
| 5 |
| 5 |
| 6 |
| 1 |
| 10 |
| 1 |
| 10 |
| 2 |
| 5 |
| 1 |
| 10 |
| 5 |
| 6 |
| 1 |
| 2 |
| 5 |
| 6 |
| 6 |
| 5 |
| 1 |
| 2 |
| 6 |
| 5 |
X=
| 3 |
| 5 |
点评:在解方程时应根据等式的性质,即等式两边同加上、同减去、同乘上或同除以某一个数(0除外),等式的两边仍相等,同时注意“=”上下要对齐.
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