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解方程：x+0.4x=21

分类: 作业答案 • 2022-09-26 21:31:24

问题描述：

解方程：x+0.4x=21

答

x＋0.4x＝21
1.4x＝21
x＝21÷1.4
x＝15

答

1.4x=2.1
x=1.5

答

1.4x=2.1
x=1.5

答

X+0.4X=21
1.4X=21
X=15

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解方程：x+0.4x=21

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