解分式方程(4000/x+1.2x)+(4400/x)=20

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答案和解析

4000/(x+1.2x) + 4400/x = 20
4000/(2.2x) + 4400/x = 20
200/(2.2x) + 220/x = 1
100/(1.1x) + 220/x = 1
x≠0
100+242=1.1x
x=342/1.1=3420/11

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