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-4(2+3b)+5b=-13
We move all terms to the left:
-4(2+3b)+5b-(-13)=0
We add all the numbers together, and all the variables
-4(3b+2)+5b-(-13)=0
We add all the numbers together, and all the variables
5b-4(3b+2)+13=0
We multiply parentheses
5b-12b-8+13=0
We add all the numbers together, and all the variables
-7b+5=0
We move all terms containing b to the left, all other terms to the right
-7b=-5
b=-5/-7
b=5/7
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