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解方程 x÷(80+x)=20%

2025-03-15 20:25:45

推荐回答（4个）

回答1：

x÷(80+x)=20%
两边同时乘以（80+x）得：
x = 20%(80+x)
x = 0.2(80+x)
x = 0.2×80 + 0.2x
x-0.2x = 16
0.8x = 16
x = 20

回答2：

x÷(80+x)=20%
16+0.2x=x
0.8x=16
x=20

回答3：

80+x=5x
4x=80
x=20

回答4：

10x=160+2x
x=20

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