d(d)+7(d)=9

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Solution for d(d)+7(d)=9 equation: 



d(d)+7(d)=9

We move all terms to the left:

d(d)+7(d)-(9)=0

We add all the numbers together, and all the variables

7d+dd-9=0

We move all terms containing d to the left, all other terms to the right

7d+dd=9

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