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2.25b+12.60=23.85
We move all terms to the left:
2.25b+12.60-(23.85)=0
We add all the numbers together, and all the variables
2.25b-11.25=0
We move all terms containing b to the left, all other terms to the right
2.25b=11.25
b=11.25/2.25
b=5
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