31=d+(-4)

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Solution for 31=d+(-4) equation: 



31=d+(-4)

We move all terms to the left:

31-(d+(-4))=0



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

d+(-4)

We add all the numbers together, and all the variables

d-4

Back to the equation:

-(d-4)



We get rid of parentheses

-d+4+31=0

We add all the numbers together, and all the variables

-1d+35=0

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

-d=-35

d=-35/-1

d=+35

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