题目内容
解方程:(100+
)×(1-
)=(1-
)x.
| x |
| 3 |
| 1 |
| 9 |
| 1 |
| 3 |
考点:方程的解和解方程
专题:简易方程
分析:先计算1-
=
,1-
=
,去掉括号,把原式改写成
+
x=
x,等式的两边同时减去
x,把原式改写成
x=
,然后等式的两边同时除以
即可.
| 1 |
| 9 |
| 8 |
| 9 |
| 1 |
| 3 |
| 2 |
| 3 |
| 800 |
| 9 |
| 8 |
| 27 |
| 2 |
| 3 |
| 8 |
| 27 |
| 10 |
| 27 |
| 800 |
| 9 |
| 10 |
| 27 |
解答:
解:(100+
)×(1-
)=(1-
)x
(100+
)×
=
x
+
x=
x
+
x-
x=
x-
x
x=
x÷
=
÷
x=240.
| x |
| 3 |
| 1 |
| 9 |
| 1 |
| 3 |
(100+
| x |
| 3 |
| 8 |
| 9 |
| 2 |
| 3 |
| 800 |
| 9 |
| 8 |
| 27 |
| 2 |
| 3 |
| 800 |
| 9 |
| 8 |
| 27 |
| 8 |
| 27 |
| 2 |
| 3 |
| 8 |
| 27 |
| 10 |
| 27 |
| 800 |
| 9 |
| 10 |
| 27 |
| 10 |
| 27 |
| 800 |
| 9 |
| 10 |
| 27 |
x=240.
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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