13/15=x/90

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Solution for 13/15=x/90 equation: 


x in (-oo:+oo)

13/15 = x/90 // - x/90

13/15-(x/90) = 0

13/15-1/90*x = 0 // - 13/15

-1/90*x = -13/15 // : -1/90

x = -13/15/(-1/90)

x = 78

x = 78

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