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3(b+3)-4-(-2+b)=19
We move all terms to the left:
3(b+3)-4-(-2+b)-(19)=0
We add all the numbers together, and all the variables
3(b+3)-(b-2)-4-19=0
We add all the numbers together, and all the variables
3(b+3)-(b-2)-23=0
We multiply parentheses
3b-(b-2)+9-23=0
We get rid of parentheses
3b-b+2+9-23=0
We add all the numbers together, and all the variables
2b-12=0
We move all terms containing b to the left, all other terms to the right
2b=12
b=12/2
b=6
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