-12=-2/7u

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Solution for -12=-2/7u equation: 


u in (-oo:+oo)

-12 = (-2/7)*u // - (-2/7)*u

-((-2/7)*u)-12 = 0

(2/7)*u-12 = 0

2/7*u-12 = 0 // + 12

2/7*u = 12 // : 2/7

u = 12/2/7

u = 42

u = 42

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