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32=2(b-7)+4
We move all terms to the left:
32-(2(b-7)+4)=0
We calculate terms in parentheses: -(2(b-7)+4), so:We get rid of parentheses
2(b-7)+4
We multiply parentheses
2b-14+4
We add all the numbers together, and all the variables
2b-10
Back to the equation:
-(2b-10)
-2b+10+32=0
We add all the numbers together, and all the variables
-2b+42=0
We move all terms containing b to the left, all other terms to the right
-2b=-42
b=-42/-2
b=+21
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