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(7-4b)=13
We move all terms to the left:
(7-4b)-(13)=0
We add all the numbers together, and all the variables
(-4b+7)-13=0
We get rid of parentheses
-4b+7-13=0
We add all the numbers together, and all the variables
-4b-6=0
We move all terms containing b to the left, all other terms to the right
-4b=6
b=6/-4
b=-1+1/2
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