-d=7-d

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Solution for -d=7-d equation: 



-d=7-d

We move all terms to the left:

-d-(7-d)=0

We add all the numbers together, and all the variables

-d-(-1d+7)=0

We add all the numbers together, and all the variables

-1d-(-1d+7)=0

We get rid of parentheses

-1d+1d-7=0

We add all the numbers together, and all the variables

-7!=0

There is no solution for this equation

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