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2d+2.51=19.79
We move all terms to the left:
2d+2.51-(19.79)=0
We add all the numbers together, and all the variables
2d-17.28=0
We move all terms containing d to the left, all other terms to the right
2d=17.28
d=17.28/2
d=8+1/1.5625
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