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2+2.50d=31.50
We move all terms to the left:
2+2.50d-(31.50)=0
We add all the numbers together, and all the variables
2.50d+2-(31.5)=0
We add all the numbers together, and all the variables
2.50d-29.5=0
We move all terms containing d to the left, all other terms to the right
2.50d=29.5
d=29.5/2.50
d=11+1/1.25
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