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13=3b-b-10
We move all terms to the left:
13-(3b-b-10)=0
We add all the numbers together, and all the variables
-(2b-10)+13=0
We get rid of parentheses
-2b+10+13=0
We add all the numbers together, and all the variables
-2b+23=0
We move all terms containing b to the left, all other terms to the right
-2b=-23
b=-23/-2
b=11+1/2
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