3/7=u/9

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Solution for 3/7=u/9 equation: 


u in (-oo:+oo)

3/7 = u/9 // - u/9

3/7-(u/9) = 0

3/7-1/9*u = 0 // - 3/7

-1/9*u = -3/7 // : -1/9

u = -3/7/(-1/9)

u = 27/7

u = 27/7

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