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(2b-11)+55+(4b+6)=180
We move all terms to the left:
(2b-11)+55+(4b+6)-(180)=0
We add all the numbers together, and all the variables
(2b-11)+(4b+6)-125=0
We get rid of parentheses
2b+4b-11+6-125=0
We add all the numbers together, and all the variables
6b-130=0
We move all terms containing b to the left, all other terms to the right
6b=130
b=130/6
b=21+2/3
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