-21=y/12 - solution

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Solution for -21=y/12 equation:

y in (-oo:+oo)

-21 = y/12 // - y/12

-(y/12)-21 = 0

-1/12*y-21 = 0 // + 21

-1/12*y = 21 // : -1/12

y = 21/(-1/12)

y = -252

y = -252

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