18/20=x/40

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Solution for 18/20=x/40 equation: 


x in (-oo:+oo)

18/20 = x/40 // - x/40

18/20-(x/40) = 0

9/10-1/40*x = 0 // - 9/10

-1/40*x = -9/10 // : -1/40

x = -9/10/(-1/40)

x = 36

x = 36

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