题目内容
| 求下列方程的解: X+40%X=42 | 70%X-53%X=34 |
|
(1)X+40%X=42
1.4X=42
1.4X÷1.4=42÷1.4
X=30
(2)70%X-53%X=34
0.17X=34
0.17X÷0.17=34÷0.17
X=200
(3)
X-
=
X-
+
=
+
X=
X×
=
×
X=
1.4X=42
1.4X÷1.4=42÷1.4
X=30
(2)70%X-53%X=34
0.17X=34
0.17X÷0.17=34÷0.17
X=200
(3)
| 5 |
| 7 |
| 2 |
| 3 |
| 1 |
| 2 |
| 5 |
| 7 |
| 2 |
| 3 |
| 2 |
| 3 |
| 1 |
| 2 |
| 2 |
| 3 |
| 5 |
| 7 |
| 7 |
| 6 |
| 5 |
| 7 |
| 7 |
| 5 |
| 7 |
| 6 |
| 7 |
| 5 |
X=
| 49 |
| 30 |
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