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b+1.5b+45b+(2b-90)=450
We move all terms to the left:
b+1.5b+45b+(2b-90)-(450)=0
We add all the numbers together, and all the variables
47.5b+(2b-90)-450=0
We get rid of parentheses
47.5b+2b-90-450=0
We add all the numbers together, and all the variables
49.5b-540=0
We move all terms containing b to the left, all other terms to the right
49.5b=540
b=540/49.5
b=10+45/49.5
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