12/18=x/21

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Solution for 12/18=x/21 equation: 


x in (-oo:+oo)

12/18 = x/21 // - x/21

12/18-(x/21) = 0

2/3-1/21*x = 0 // - 2/3

-1/21*x = -2/3 // : -1/21

x = -2/3/(-1/21)

x = 14

x = 14

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