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2=-5(4)+b
We move all terms to the left:
2-(-5(4)+b)=0
We add all the numbers together, and all the variables
-(b-54)+2=0
We get rid of parentheses
-b+54+2=0
We add all the numbers together, and all the variables
-1b+56=0
We move all terms containing b to the left, all other terms to the right
-b=-56
b=-56/-1
b=+56
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