7d-9=8d+9-10

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



7d-9=8d+9-10

We move all terms to the left:

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

We add all the numbers together, and all the variables

7d-(8d-1)-9=0

We get rid of parentheses

7d-8d+1-9=0

We add all the numbers together, and all the variables

-1d-8=0

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

-d=8

d=8/-1

d=-8

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