7/21=x/63

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Solution for 7/21=x/63 equation: 


x in (-oo:+oo)

7/21 = x/63 // - x/63

7/21-(x/63) = 0

1/3-1/63*x = 0 // - 1/3

-1/63*x = -1/3 // : -1/63

x = -1/3/(-1/63)

x = 21

x = 21

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