题目内容
解方程.
(1)
x+
=1 (2)x×(
+
)=
.
(1)
| 2 |
| 3 |
| 3 |
| 4 |
| 5 |
| 6 |
| 5 |
| 8 |
| 7 |
| 20 |
分析:(1)等式的两边同时减去
,然后等式的两边同时除以
即可;
(2)先计算
+
=
,然后等式的两边同时除以
即可.
| 3 |
| 4 |
| 2 |
| 3 |
(2)先计算
| 5 |
| 6 |
| 5 |
| 8 |
| 35 |
| 24 |
| 35 |
| 24 |
解答:解:
(1)
x+
=1,
x+
-
=1-
,
x=
,
x÷
=
÷
,
x=
;
(2)x×(
+
)=
,
x=
,
x÷
=
÷
,
x=
.
(1)
| 2 |
| 3 |
| 3 |
| 4 |
| 2 |
| 3 |
| 3 |
| 4 |
| 3 |
| 4 |
| 3 |
| 4 |
| 2 |
| 3 |
| 1 |
| 4 |
| 2 |
| 3 |
| 2 |
| 3 |
| 1 |
| 4 |
| 2 |
| 3 |
x=
| 3 |
| 8 |
(2)x×(
| 5 |
| 6 |
| 5 |
| 8 |
| 7 |
| 20 |
| 35 |
| 24 |
| 7 |
| 20 |
| 35 |
| 24 |
| 35 |
| 24 |
| 7 |
| 20 |
| 35 |
| 24 |
x=
| 6 |
| 25 |
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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