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2b-30=4b-82
We move all terms to the left:
2b-30-(4b-82)=0
We get rid of parentheses
2b-4b+82-30=0
We add all the numbers together, and all the variables
-2b+52=0
We move all terms containing b to the left, all other terms to the right
-2b=-52
b=-52/-2
b=+26
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