-42=-7/4u

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Solution for -42=-7/4u equation: 


u in (-oo:+oo)

-42 = (-7/4)*u // - (-7/4)*u

-((-7/4)*u)-42 = 0

(7/4)*u-42 = 0

7/4*u-42 = 0 // + 42

7/4*u = 42 // : 7/4

u = 42/7/4

u = 24

u = 24

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