70/100=x/30

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Solution for 70/100=x/30 equation: 


x in (-oo:+oo)

70/100 = x/30 // - x/30

70/100-(x/30) = 0

7/10-1/30*x = 0 // - 7/10

-1/30*x = -7/10 // : -1/30

x = -7/10/(-1/30)

x = 21

x = 21

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