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42+3b=-b-14
We move all terms to the left:
42+3b-(-b-14)=0
We add all the numbers together, and all the variables
3b-(-1b-14)+42=0
We get rid of parentheses
3b+1b+14+42=0
We add all the numbers together, and all the variables
4b+56=0
We move all terms containing b to the left, all other terms to the right
4b=-56
b=-56/4
b=-14
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