4/21=x/87

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Solution for 4/21=x/87 equation: 


x in (-oo:+oo)

4/21 = x/87 // - x/87

4/21-(x/87) = 0

4/21-1/87*x = 0 // - 4/21

-1/87*x = -4/21 // : -1/87

x = -4/21/(-1/87)

x = 116/7

x = 116/7

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