-21=7/8y

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Solution for -21=7/8y equation: 


y in (-oo:+oo)

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

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

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

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

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

y = 21/(-7/8)

y = -24

y = -24

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