-21=-7/8w

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Solution for -21=-7/8w equation: 


w in (-oo:+oo)

-21 = (-7/8)*w // - (-7/8)*w

-((-7/8)*w)-21 = 0

(7/8)*w-21 = 0

7/8*w-21 = 0 // + 21

7/8*w = 21 // : 7/8

w = 21/7/8

w = 24

w = 24

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