3/21=x/1

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Solution for 3/21=x/1 equation: 


x in (-oo:+oo)

3/21 = x/1 // - x/1

3/21-(x/1) = 0

3/21-x = 0

1/7-x = 0 // - 1/7

-x = -1/7 // * -1

x = 1/7

x = 1/7

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