题目内容
解方程:
X+X=98;
12:
=X:
;
60%X-18=72.
| 3 |
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12:
| 3 |
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| 1 |
| 2 |
60%X-18=72.
| 3 |
| 4 |
| 7 |
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| 7 |
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| 7 |
| 4 |
| 7 |
| 4 |
x=56;
(2)12:
| 3 |
| 5 |
| 1 |
| 2 |
| 3 |
| 5 |
| 1 |
| 2 |
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 5 |
x=10;
(3)60%X-18=72,
0.6x-18+18=72+18,
0.6x=90,
0.6x÷0.6=90÷0.6,
x=150.
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