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-3=d/9+2
We move all terms to the left:
-3-(d/9+2)=0
We get rid of parentheses
-d/9-2-3=0
We multiply all the terms by the denominator
-d-2*9-3*9=0
We add all the numbers together, and all the variables
-1d-45=0
We move all terms containing d to the left, all other terms to the right
-d=45
d=45/-1
d=-45
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