7=-9d+2d

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Solution for 7=-9d+2d equation: 



7=-9d+2d

We move all terms to the left:

7-(-9d+2d)=0

We add all the numbers together, and all the variables

-(-7d)+7=0

We get rid of parentheses

7d+7=0

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

7d=-7

d=-7/7

d=-1

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