1/21=x/9

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Solution for 1/21=x/9 equation: 


x in (-oo:+oo)

1/21 = x/9 // - x/9

1/21-(x/9) = 0

1/21-1/9*x = 0 // - 1/21

-1/9*x = -1/21 // : -1/9

x = -1/21/(-1/9)

x = 3/7

x = 3/7

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