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-3(-8+b)=-12
We move all terms to the left:
-3(-8+b)-(-12)=0
We add all the numbers together, and all the variables
-3(b-8)-(-12)=0
We add all the numbers together, and all the variables
-3(b-8)+12=0
We multiply parentheses
-3b+24+12=0
We add all the numbers together, and all the variables
-3b+36=0
We move all terms containing b to the left, all other terms to the right
-3b=-36
b=-36/-3
b=+12
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