题目内容
求未知数x
x+
=
x-
x=
.
| 11 |
| 2 |
| 1 |
| 6 |
| 5 |
| 8 |
| 1 |
| 3 |
| 1 |
| 4 |
| 7 |
| 30 |
分析:(1)根据等式的性质,两边同时减去
,再同时除以
求解即可,
(2)先化简方程,再根据等式的性质,两边同时除以
求解即可.
| 1 |
| 6 |
| 11 |
| 2 |
(2)先化简方程,再根据等式的性质,两边同时除以
| 1 |
| 12 |
解答:解:(1)
x+
=
,
x+
-
=
-
,
x=
,
x÷
=
÷
,
x=
;
(2)
x-
x=
,
x=
,
x÷
=
÷
,
x=
.
| 11 |
| 2 |
| 1 |
| 6 |
| 5 |
| 8 |
| 11 |
| 2 |
| 1 |
| 6 |
| 1 |
| 6 |
| 5 |
| 8 |
| 1 |
| 6 |
| 11 |
| 2 |
| 11 |
| 24 |
| 11 |
| 2 |
| 11 |
| 2 |
| 11 |
| 24 |
| 11 |
| 2 |
x=
| 1 |
| 12 |
(2)
| 1 |
| 3 |
| 1 |
| 4 |
| 7 |
| 30 |
| 1 |
| 12 |
| 7 |
| 30 |
| 1 |
| 12 |
| 1 |
| 12 |
| 7 |
| 30 |
| 1 |
| 12 |
x=
| 14 |
| 5 |
点评:考查了根据等式的性质来求方程的解,注意等号要对齐.
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