12/21=x/28

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Solution for 12/21=x/28 equation: 


x in (-oo:+oo)

12/21 = x/28 // - x/28

12/21-(x/28) = 0

4/7-1/28*x = 0 // - 4/7

-1/28*x = -4/7 // : -1/28

x = -4/7/(-1/28)

x = 16

x = 16

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