题目内容
| 求未知数x. 2.5:12=1.5:x |
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(1)2.5:12=1.5:x,
2.5x=12×1.5,
2.5x=18,
2.5x÷2.5=18÷2.5,
x=7.2;
(2)
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x=4.
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题目内容
| 求未知数x. 2.5:12=1.5:x |
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