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3+2d=12/3+2=3
We move all terms to the left:
3+2d-(12/3+2)=0
We add all the numbers together, and all the variables
2d+3-6=0
We add all the numbers together, and all the variables
2d-3=0
We move all terms containing d to the left, all other terms to the right
2d=3
d=3/2
d=1+1/2
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