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4(b+2)*2-(3b-49)=0
We multiply parentheses
8b-(3b-49)+16=0
We get rid of parentheses
8b-3b+49+16=0
We add all the numbers together, and all the variables
5b+65=0
We move all terms containing b to the left, all other terms to the right
5b=-65
b=-65/5
b=-13
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