-6-3y-12=21

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Solution for -6-3y-12=21 equation: 



-6-3y-12=21

We move all terms to the left:

-6-3y-12-(21)=0

We add all the numbers together, and all the variables

-3y-39=0

We move all terms containing y to the left, all other terms to the right

-3y=39

y=39/-3

y=-13

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