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3(b+8)=-3*4
We move all terms to the left:
3(b+8)-(-3*4)=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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