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-13=3b-4-6
We move all terms to the left:
-13-(3b-4-6)=0
We add all the numbers together, and all the variables
-(3b-10)-13=0
We get rid of parentheses
-3b+10-13=0
We add all the numbers together, and all the variables
-3b-3=0
We move all terms containing b to the left, all other terms to the right
-3b=3
b=3/-3
b=-1
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