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4=2(2b+2)-68
We move all terms to the left:
4-(2(2b+2)-68)=0
We calculate terms in parentheses: -(2(2b+2)-68), so:We get rid of parentheses
2(2b+2)-68
We multiply parentheses
4b+4-68
We add all the numbers together, and all the variables
4b-64
Back to the equation:
-(4b-64)
-4b+64+4=0
We add all the numbers together, and all the variables
-4b+68=0
We move all terms containing b to the left, all other terms to the right
-4b=-68
b=-68/-4
b=+17
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