7+d-7=d-7+7

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Solution for 7+d-7=d-7+7 equation: 



7+d-7=d-7+7

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We add all the numbers together, and all the variables

d-(+d)=0

We get rid of parentheses

d-d=0

We add all the numbers together, and all the variables

=0

d=0/1

d=0

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