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b+(b+1)/4+b+2=21
We move all terms to the left:
b+(b+1)/4+b+2-(21)=0
We add all the numbers together, and all the variables
2b+(b+1)/4-19=0
We multiply all the terms by the denominator
2b*4+(b+1)-19*4=0
We add all the numbers together, and all the variables
2b*4+(b+1)-76=0
Wy multiply elements
8b+(b+1)-76=0
We get rid of parentheses
8b+b+1-76=0
We add all the numbers together, and all the variables
9b-75=0
We move all terms containing b to the left, all other terms to the right
9b=75
b=75/9
b=8+1/3
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