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-2-2b=-4b
We move all terms to the left:
-2-2b-(-4b)=0
We get rid of parentheses
-2b+4b-2=0
We add all the numbers together, and all the variables
2b-2=0
We move all terms containing b to the left, all other terms to the right
2b=2
b=2/2
b=1
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