42=6/7u

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Solution for 42=6/7u equation: 


u in (-oo:+oo)

42 = (6/7)*u // - (6/7)*u

42-((6/7)*u) = 0

(-6/7)*u+42 = 0

42-6/7*u = 0 // - 42

-6/7*u = -42 // : -6/7

u = -42/(-6/7)

u = 49

u = 49

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