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2b+(b-2)=180
We move all terms to the left:
2b+(b-2)-(180)=0
We get rid of parentheses
2b+b-2-180=0
We add all the numbers together, and all the variables
3b-182=0
We move all terms containing b to the left, all other terms to the right
3b=182
b=182/3
b=60+2/3
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