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5b-4.5+2.5=-18.5
We move all terms to the left:
5b-4.5+2.5-(-18.5)=0
We add all the numbers together, and all the variables
5b+16.5=0
We move all terms containing b to the left, all other terms to the right
5b=-16.5
b=-16.5/5
b=-3+1/3.3333333333333
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