-40=8(7+d)

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Solution for -40=8(7+d) equation: 



-40=8(7+d)

We move all terms to the left:

-40-(8(7+d))=0

We add all the numbers together, and all the variables

-(8(d+7))-40=0



We calculate terms in parentheses: -(8(d+7)), so:

8(d+7)

We multiply parentheses

8d+56

Back to the equation:

-(8d+56)



We get rid of parentheses

-8d-56-40=0

We add all the numbers together, and all the variables

-8d-96=0

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

-8d=96

d=96/-8

d=-12

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