题目内容
解方程
X-
| X÷
| 40%X-
|
(1)X-
X=
,
X=
,
X÷
=
÷
,
X=
;
(2)X÷
=15×
,
X÷
×
=15×
×
,
X=
;
(3)40%X-
=
,
40%X-
+
=
+
,
40%X=
,
40%X÷40%=
÷40%,
X=
.
| 2 |
| 7 |
| 1 |
| 14 |
| 5 |
| 7 |
| 1 |
| 14 |
| 5 |
| 7 |
| 5 |
| 7 |
| 1 |
| 14 |
| 5 |
| 7 |
X=
| 1 |
| 10 |
(2)X÷
| 1 |
| 8 |
| 2 |
| 3 |
X÷
| 1 |
| 8 |
| 1 |
| 8 |
| 2 |
| 3 |
| 1 |
| 8 |
X=
| 5 |
| 4 |
(3)40%X-
| 1 |
| 4 |
| 7 |
| 12 |
40%X-
| 1 |
| 4 |
| 1 |
| 4 |
| 7 |
| 12 |
| 1 |
| 4 |
40%X=
| 5 |
| 6 |
40%X÷40%=
| 5 |
| 6 |
X=
| 25 |
| 12 |
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