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4b-2=2b+7
We move all terms to the left:
4b-2-(2b+7)=0
We get rid of parentheses
4b-2b-7-2=0
We add all the numbers together, and all the variables
2b-9=0
We move all terms containing b to the left, all other terms to the right
2b=9
b=9/2
b=4+1/2
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