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55=-2+2b
We move all terms to the left:
55-(-2+2b)=0
We add all the numbers together, and all the variables
-(2b-2)+55=0
We get rid of parentheses
-2b+2+55=0
We add all the numbers together, and all the variables
-2b+57=0
We move all terms containing b to the left, all other terms to the right
-2b=-57
b=-57/-2
b=28+1/2
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