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3d/4-2=7
We move all terms to the left:
3d/4-2-(7)=0
We add all the numbers together, and all the variables
3d/4-9=0
We multiply all the terms by the denominator
3d-9*4=0
We add all the numbers together, and all the variables
3d-36=0
We move all terms containing d to the left, all other terms to the right
3d=36
d=36/3
d=12
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