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-7b-14=-5b-45
We move all terms to the left:
-7b-14-(-5b-45)=0
We get rid of parentheses
-7b+5b+45-14=0
We add all the numbers together, and all the variables
-2b+31=0
We move all terms containing b to the left, all other terms to the right
-2b=-31
b=-31/-2
b=15+1/2
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