7=4d-9

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Solution for 7=4d-9 equation: 



7=4d-9

We move all terms to the left:

7-(4d-9)=0

We get rid of parentheses

-4d+9+7=0

We add all the numbers together, and all the variables

-4d+16=0

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

-4d=-16

d=-16/-4

d=+4

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