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12+3d=32.50
We move all terms to the left:
12+3d-(32.50)=0
We add all the numbers together, and all the variables
3d+12-(32.5)=0
We add all the numbers together, and all the variables
3d-20.5=0
We move all terms containing d to the left, all other terms to the right
3d=20.5
d=20.5/3
d=6+2.5/3
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