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2(2b+7)=-12+6b
We move all terms to the left:
2(2b+7)-(-12+6b)=0
We add all the numbers together, and all the variables
2(2b+7)-(6b-12)=0
We multiply parentheses
4b-(6b-12)+14=0
We get rid of parentheses
4b-6b+12+14=0
We add all the numbers together, and all the variables
-2b+26=0
We move all terms containing b to the left, all other terms to the right
-2b=-26
b=-26/-2
b=+13
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