百分数的解方程15％x+35=65====18-150％x=6====﹙1+25％﹚x=56====x-30％x=4.97====

分类: 作业答案 • 2022-04-17 22:25:14

问题描述：

百分数的解方程
15％x+35=65
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18-150％x=6
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﹙1+25％﹚x=56
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x-30％x=4.97
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答

1：15％x+35=65
0.15x=65-35
0.15x=30
x=200
2:18-150％x=6
18-6=1.5x
12=1.5x
8=x
3:﹙1+25％﹚x=56
1.25x=56
x=44.8
4:x-30％x=4.97
(1-30%)x=4.97
0.7x=4.97
x=7.1