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61=2(19)+b
We move all terms to the left:
61-(2(19)+b)=0
We add all the numbers together, and all the variables
-(b+219)+61=0
We get rid of parentheses
-b-219+61=0
We add all the numbers together, and all the variables
-1b-158=0
We move all terms containing b to the left, all other terms to the right
-b=158
b=158/-1
b=-158
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