7d-9=5d-1

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Solution for 7d-9=5d-1 equation: 



7d-9=5d-1

We move all terms to the left:

7d-9-(5d-1)=0

We get rid of parentheses

7d-5d+1-9=0

We add all the numbers together, and all the variables

2d-8=0

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

2d=8

d=8/2

d=4

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