-1=7+4d

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Solution for -1=7+4d equation: 



-1=7+4d

We move all terms to the left:

-1-(7+4d)=0

We add all the numbers together, and all the variables

-(4d+7)-1=0

We get rid of parentheses

-4d-7-1=0

We add all the numbers together, and all the variables

-4d-8=0

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

-4d=8

d=8/-4

d=-2

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