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4=2+2b
We move all terms to the left:
4-(2+2b)=0
We add all the numbers together, and all the variables
-(2b+2)+4=0
We get rid of parentheses
-2b-2+4=0
We add all the numbers together, and all the variables
-2b+2=0
We move all terms containing b to the left, all other terms to the right
-2b=-2
b=-2/-2
b=1
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