7d+7=-28

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Solution for 7d+7=-28 equation: 



7d+7=-28

We move all terms to the left:

7d+7-(-28)=0

We add all the numbers together, and all the variables

7d+35=0

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

7d=-35

d=-35/7

d=-5

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