4/9=x/15

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Solution for 4/9=x/15 equation: 


x in (-oo:+oo)

4/9 = x/15 // - x/15

4/9-(x/15) = 0

4/9-1/15*x = 0 // - 4/9

-1/15*x = -4/9 // : -1/15

x = -4/9/(-1/15)

x = 20/3

x = 20/3

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