3/7=9/7u

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Solution for 3/7=9/7u equation: 


u in (-oo:+oo)

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

3/7-((9/7)*u) = 0

(-9/7)*u+3/7 = 0

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

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

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

u = 1/3

u = 1/3

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