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27=4b-4
We move all terms to the left:
27-(4b-4)=0
We get rid of parentheses
-4b+4+27=0
We add all the numbers together, and all the variables
-4b+31=0
We move all terms containing b to the left, all other terms to the right
-4b=-31
b=-31/-4
b=7+3/4
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