10d-4=7d+8-9d

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



10d-4=7d+8-9d

We move all terms to the left:

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

We add all the numbers together, and all the variables

10d-(-2d+8)-4=0

We get rid of parentheses

10d+2d-8-4=0

We add all the numbers together, and all the variables

12d-12=0

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

12d=12

d=12/12

d=1

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