-12-4b=20

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Solution for -12-4b=20 equation: 



-12-4b=20

We move all terms to the left:

-12-4b-(20)=0

We add all the numbers together, and all the variables

-4b-32=0

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

-4b=32

b=32/-4

b=-8

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