9=2(d-4)+1

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Solution for 9=2(d-4)+1 equation: 



9=2(d-4)+1

We move all terms to the left:

9-(2(d-4)+1)=0



We calculate terms in parentheses: -(2(d-4)+1), so:

2(d-4)+1

We multiply parentheses

2d-8+1

We add all the numbers together, and all the variables

2d-7

Back to the equation:

-(2d-7)



We get rid of parentheses

-2d+7+9=0

We add all the numbers together, and all the variables

-2d+16=0

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

-2d=-16

d=-16/-2

d=+8

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