题目内容
解方程
|
| ||||||||
x÷
|
x÷
|
分析:(1)等式的两边同时除以
即可;
(2)等式的两边同时除以
即可;
(3)等式的两边同时乘
即可;
(4)等式的两边同时乘
即可.
| 1 |
| 5 |
(2)等式的两边同时除以
| 3 |
| 8 |
(3)等式的两边同时乘
| 1 |
| 9 |
(4)等式的两边同时乘
| 13 |
| 15 |
解答:解:
(1)
x=
,
x÷
=
÷
,
x=
;
(2)
x=
,
x÷
=
÷
,
x=2;
(3)x÷
=
,
x÷
×
=
×
,
x=
;
(4)x÷
=
,
x÷
×
=
×
,
x=
.
(1)
| 1 |
| 5 |
| 1 |
| 2 |
| 1 |
| 5 |
| 1 |
| 5 |
| 1 |
| 2 |
| 1 |
| 5 |
x=
| 5 |
| 2 |
(2)
| 3 |
| 8 |
| 3 |
| 4 |
| 3 |
| 8 |
| 3 |
| 8 |
| 3 |
| 4 |
| 3 |
| 8 |
x=2;
(3)x÷
| 1 |
| 9 |
| 7 |
| 27 |
x÷
| 1 |
| 9 |
| 1 |
| 9 |
| 7 |
| 27 |
| 1 |
| 9 |
x=
| 7 |
| 243 |
(4)x÷
| 13 |
| 15 |
| 26 |
| 45 |
x÷
| 13 |
| 15 |
| 13 |
| 15 |
| 26 |
| 45 |
| 13 |
| 15 |
x=
| 338 |
| 675 |
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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