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16=-7b+2b
We move all terms to the left:
16-(-7b+2b)=0
We add all the numbers together, and all the variables
-(-5b)+16=0
We get rid of parentheses
5b+16=0
We move all terms containing b to the left, all other terms to the right
5b=-16
b=-16/5
b=-3+1/5
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