题目内容
解方程.
| X-60%=60 | X-
|
(A-
|
分析:(1)等式的两边同时加上60%即可;
(2)先计算X-
X=
X,然后等式的两边同时除以
即可;
(3)根据比与除法的关系,把原式改写成(A-
)÷
=
,等式的两边同时乘上
,然后等式的两边再同时加上
即可.
(2)先计算X-
| 2 |
| 7 |
| 5 |
| 7 |
| 5 |
| 7 |
(3)根据比与除法的关系,把原式改写成(A-
| 1 |
| 3 |
| 3 |
| 4 |
| 5 |
| 6 |
| 3 |
| 4 |
| 1 |
| 3 |
解答:解:(1)X-60%=60,
X-60%+60%=60+60%,
X=60.6;
(2)X-
X=
,
X=
,
X÷
=
÷
,
X=
;
(3)(A-
):
=
,
(A-
)÷
=
,
(A-
)÷
×
=
×
,
A-
=
,
A-
+
=
+
,
A=
.
X-60%+60%=60+60%,
X=60.6;
(2)X-
| 2 |
| 7 |
| 1 |
| 14 |
| 5 |
| 7 |
| 1 |
| 14 |
| 5 |
| 7 |
| 5 |
| 7 |
| 1 |
| 14 |
| 5 |
| 7 |
X=
| 1 |
| 10 |
(3)(A-
| 1 |
| 3 |
| 3 |
| 4 |
| 5 |
| 6 |
(A-
| 1 |
| 3 |
| 3 |
| 4 |
| 5 |
| 6 |
(A-
| 1 |
| 3 |
| 3 |
| 4 |
| 3 |
| 4 |
| 5 |
| 6 |
| 3 |
| 4 |
A-
| 1 |
| 3 |
| 5 |
| 8 |
A-
| 1 |
| 3 |
| 1 |
| 3 |
| 5 |
| 8 |
| 1 |
| 3 |
A=
| 23 |
| 24 |
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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