题目内容
解方程.
+
X=2
X-40%X=
.
| 8 |
| 9 |
| 1 |
| 9 |
X-40%X=
| 1 |
| 4 |
(1)
+
X=2,
+
X-
=2-
,
X=
,
X÷
=
÷
,
X=
×9,
X=10;
(2)X-40%X=
,
(1-40%)X=
,
60%X÷60%=
÷60%,
X=
÷
,
X=
×
,
X=
.
| 8 |
| 9 |
| 1 |
| 9 |
| 8 |
| 9 |
| 1 |
| 9 |
| 8 |
| 9 |
| 8 |
| 9 |
| 1 |
| 9 |
| 10 |
| 9 |
| 1 |
| 9 |
| 1 |
| 9 |
| 10 |
| 9 |
| 1 |
| 9 |
X=
| 10 |
| 9 |
X=10;
(2)X-40%X=
| 1 |
| 4 |
(1-40%)X=
| 1 |
| 4 |
60%X÷60%=
| 1 |
| 4 |
X=
| 1 |
| 4 |
| 3 |
| 5 |
X=
| 1 |
| 4 |
| 5 |
| 3 |
X=
| 5 |
| 12 |
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