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71+30d=350+30d
We move all terms to the left:
71+30d-(350+30d)=0
We add all the numbers together, and all the variables
30d-(30d+350)+71=0
We get rid of parentheses
30d-30d-350+71=0
We add all the numbers together, and all the variables
-279!=0
There is no solution for this equation
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