数学智力题:(420-X)除以3=(600-X)除以5 X=?

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数学智力题:(420-X)除以3=(600-X)除以5X=?数学智力题:(420-X)除以3=(600-X)除以5X=?数学智力题:(420-X)除以3=(600-X)除以5X=?(420-X)除以3

数学智力题:(420-X)除以3=(600-X)除以5 X=?
数学智力题:(420-X)除以3=(600-X)除以5 X=?

数学智力题:(420-X)除以3=(600-X)除以5 X=?
(420-X)除以3=(600-X)除以5
5(420-x)=3(600-x)
2100-5x=1800-3x
5x-3x=2100-1800
2x=300
x=150

:(420-X)除以3=(600-X)除以5
5(420-x)=3(600-x)
2100-5x=1800-3x
-5x+3x=1800-2100
-2x=-300
x=150

(420-X)除以3=(600-X)除以5
5(420-X)=3(600-X)
2100-5x=1800-3x
2x=300
x=150

X=150