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824=2(291+b)
We move all terms to the left:
824-(2(291+b))=0
We add all the numbers together, and all the variables
-(2(b+291))+824=0
We calculate terms in parentheses: -(2(b+291)), so:We get rid of parentheses
2(b+291)
We multiply parentheses
2b+582
Back to the equation:
-(2b+582)
-2b-582+824=0
We add all the numbers together, and all the variables
-2b+242=0
We move all terms containing b to the left, all other terms to the right
-2b=-242
b=-242/-2
b=+121
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