题目内容
解方程:
| x-
| x÷
|
考点:方程的解和解方程
专题:简易方程
分析:(1)等式的两边同时加上
,然后等式的两边同时除以
即可;
(2)先计算x-
x=
x,然后等式的两边同时除以
即可;
(3)等式的两边同时乘
即可.
| 1 |
| 3 |
| 14 |
| 15 |
(2)先计算x-
| 1 |
| 4 |
| 3 |
| 4 |
| 3 |
| 4 |
(3)等式的两边同时乘
| 3 |
| 4 |
解答:
解:(1)
x-
=
x-
+
=
+
x=
x÷
=
÷
x=
;
(2)x-
x=
x=
x÷
=
÷
x=
;
(3)x÷
=
x÷
×
=
×
x=
.
| 14 |
| 15 |
| 1 |
| 3 |
| 1 |
| 4 |
| 14 |
| 15 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 3 |
| 14 |
| 15 |
| 7 |
| 12 |
| 14 |
| 15 |
| 14 |
| 15 |
| 7 |
| 12 |
| 14 |
| 15 |
x=
| 5 |
| 8 |
(2)x-
| 1 |
| 4 |
| 27 |
| 28 |
| 3 |
| 4 |
| 27 |
| 28 |
| 3 |
| 4 |
| 3 |
| 4 |
| 27 |
| 28 |
| 3 |
| 4 |
x=
| 9 |
| 7 |
(3)x÷
| 3 |
| 4 |
| 1 |
| 5 |
x÷
| 3 |
| 4 |
| 3 |
| 4 |
| 1 |
| 5 |
| 3 |
| 4 |
x=
| 3 |
| 20 |
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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