7/21=x/3

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Solution for 7/21=x/3 equation: 


x in (-oo:+oo)

7/21 = x/3 // - x/3

7/21-(x/3) = 0

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

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

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

x = 1

x = 1

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