-12y-21=87

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Solution for -12y-21=87 equation: 



-12y-21=87

We move all terms to the left:

-12y-21-(87)=0

We add all the numbers together, and all the variables

-12y-108=0

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

-12y=108

y=108/-12

y=-9

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