-9d+31=2(2d-3)-80

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Solution for -9d+31=2(2d-3)-80 equation: 



-9d+31=2(2d-3)-80

We move all terms to the left:

-9d+31-(2(2d-3)-80)=0



We calculate terms in parentheses: -(2(2d-3)-80), so:

2(2d-3)-80

We multiply parentheses

4d-6-80

We add all the numbers together, and all the variables

4d-86

Back to the equation:

-(4d-86)



We get rid of parentheses

-9d-4d+86+31=0

We add all the numbers together, and all the variables

-13d+117=0

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

-13d=-117

d=-117/-13

d=+9

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