21=7/8w

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Solution for 21=7/8w equation: 


w in (-oo:+oo)

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

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

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

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

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

w = -21/(-7/8)

w = 24

w = 24

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