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2(12b+7)+9b+1=18
We move all terms to the left:
2(12b+7)+9b+1-(18)=0
We add all the numbers together, and all the variables
9b+2(12b+7)-17=0
We multiply parentheses
9b+24b+14-17=0
We add all the numbers together, and all the variables
33b-3=0
We move all terms containing b to the left, all other terms to the right
33b=3
b=3/33
b=1/11
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