-9-y/7=-12

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Solution for -9-y/7=-12 equation: 


y in (-oo:+oo)

-(y/7)-9 = -12 // + 12

12-(y/7)-9 = 0

3-1/7*y = 0 // - 3

-1/7*y = -3 // : -1/7

y = -3/(-1/7)

y = 21

y = 21

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