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-4=2(4)+b
We move all terms to the left:
-4-(2(4)+b)=0
We add all the numbers together, and all the variables
-(b+24)-4=0
We get rid of parentheses
-b-24-4=0
We add all the numbers together, and all the variables
-1b-28=0
We move all terms containing b to the left, all other terms to the right
-b=28
b=28/-1
b=-28
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