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(13b-2)-6(2b+4)=-7
We move all terms to the left:
(13b-2)-6(2b+4)-(-7)=0
We add all the numbers together, and all the variables
(13b-2)-6(2b+4)+7=0
We multiply parentheses
(13b-2)-12b-24+7=0
We get rid of parentheses
13b-12b-2-24+7=0
We add all the numbers together, and all the variables
b-19=0
We move all terms containing b to the left, all other terms to the right
b=19
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