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7(b-2)=-70
We move all terms to the left:
7(b-2)-(-70)=0
We add all the numbers together, and all the variables
7(b-2)+70=0
We multiply parentheses
7b-14+70=0
We add all the numbers together, and all the variables
7b+56=0
We move all terms containing b to the left, all other terms to the right
7b=-56
b=-56/7
b=-8
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