42=3/7u

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Solution for 42=3/7u equation: 


u in (-oo:+oo)

42 = (3/7)*u // - (3/7)*u

42-((3/7)*u) = 0

(-3/7)*u+42 = 0

42-3/7*u = 0 // - 42

-3/7*u = -42 // : -3/7

u = -42/(-3/7)

u = 98

u = 98

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