7+8d+9=10d-4

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Solution for 7+8d+9=10d-4 equation: 



7+8d+9=10d-4

We move all terms to the left:

7+8d+9-(10d-4)=0

We add all the numbers together, and all the variables

8d-(10d-4)+16=0

We get rid of parentheses

8d-10d+4+16=0

We add all the numbers together, and all the variables

-2d+20=0

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

-2d=-20

d=-20/-2

d=+10

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