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-8(b+-13)=56
We move all terms to the left:
-8(b+-13)-(56)=0
We add all the numbers together, and all the variables
-8(b-13)-56=0
We multiply parentheses
-8b+104-56=0
We add all the numbers together, and all the variables
-8b+48=0
We move all terms containing b to the left, all other terms to the right
-8b=-48
b=-48/-8
b=+6
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