8-9d=21d-17

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Solution for 8-9d=21d-17 equation: 



8-9d=21d-17

We move all terms to the left:

8-9d-(21d-17)=0

We get rid of parentheses

-9d-21d+17+8=0

We add all the numbers together, and all the variables

-30d+25=0

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

-30d=-25

d=-25/-30

d=5/6

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