题目内容
解方程:
(1)
x-1
=0
(2)
x+
=1
.
(1)
| 8 |
| 3 |
| 3 |
| 5 |
(2)
| 6 |
| 7 |
| 1 |
| 3 |
| 3 |
| 4 |
分析:(1)等式的两边同时加上1
,然后等式的两边同时除以
即可;
(2)等式的两边同时减去
,然后等式的两边同时除以
即可.
| 3 |
| 5 |
| 8 |
| 3 |
(2)等式的两边同时减去
| 1 |
| 3 |
| 6 |
| 7 |
解答:解:
(1)
x-1
=0
x-1
+1
=0+1
x=1
x÷
=1
÷
x=
;
(2)
x+
=1
x+
-
=1
-
x=1
x÷
=1
÷
x=
.
(1)
| 8 |
| 3 |
| 3 |
| 5 |
| 8 |
| 3 |
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
| 8 |
| 3 |
| 3 |
| 5 |
| 8 |
| 3 |
| 8 |
| 3 |
| 3 |
| 5 |
| 8 |
| 3 |
x=
| 3 |
| 5 |
(2)
| 6 |
| 7 |
| 1 |
| 3 |
| 3 |
| 4 |
| 6 |
| 7 |
| 1 |
| 3 |
| 1 |
| 3 |
| 3 |
| 4 |
| 1 |
| 3 |
| 6 |
| 7 |
| 5 |
| 12 |
| 6 |
| 7 |
| 6 |
| 7 |
| 5 |
| 12 |
| 6 |
| 7 |
x=
| 119 |
| 72 |
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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