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5(2b+1.25)=20
We move all terms to the left:
5(2b+1.25)-(20)=0
We multiply parentheses
10b+6.25-20=0
We add all the numbers together, and all the variables
10b-13.75=0
We move all terms containing b to the left, all other terms to the right
10b=13.75
b=13.75/10
b=1+2.1428571428571/5.7142857142857
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