42=-7/8u

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Solution for 42=-7/8u equation: 


u in (-oo:+oo)

42 = (-7/8)*u // - (-7/8)*u

42-((-7/8)*u) = 0

(7/8)*u+42 = 0

7/8*u+42 = 0 // - 42

7/8*u = -42 // : 7/8

u = -42/7/8

u = -48

u = -48

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