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b+1.5b+(2b-10)+(b+45)=540
We move all terms to the left:
b+1.5b+(2b-10)+(b+45)-(540)=0
We add all the numbers together, and all the variables
2.5b+(2b-10)+(b+45)-540=0
We get rid of parentheses
2.5b+2b+b-10+45-540=0
We add all the numbers together, and all the variables
5.5b-505=0
We move all terms containing b to the left, all other terms to the right
5.5b=505
b=505/5.5
b=91+3/3.6666666666667
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