12/4=x/9

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Solution for 12/4=x/9 equation: 


x in (-oo:+oo)

12/4 = x/9 // - x/9

12/4-(x/9) = 0

3-1/9*x = 0 // - 3

-1/9*x = -3 // : -1/9

x = -3/(-1/9)

x = 27

x = 27

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