7+8d=-9+10d

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Solution for 7+8d=-9+10d equation: 



7+8d=-9+10d

We move all terms to the left:

7+8d-(-9+10d)=0

We add all the numbers together, and all the variables

8d-(10d-9)+7=0

We get rid of parentheses

8d-10d+9+7=0

We add all the numbers together, and all the variables

-2d+16=0

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

-2d=-16

d=-16/-2

d=+8

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