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-4b-100=-b
We move all terms to the left:
-4b-100-(-b)=0
We add all the numbers together, and all the variables
-4b-(-1b)-100=0
We get rid of parentheses
-4b+1b-100=0
We add all the numbers together, and all the variables
-3b-100=0
We move all terms containing b to the left, all other terms to the right
-3b=100
b=100/-3
b=-33+1/3
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