7-r=7+r

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Solution for 7-r=7+r equation: 



7-r=7+r

We move all terms to the left:

7-r-(7+r)=0

We add all the numbers together, and all the variables

-r-(r+7)+7=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

-1r-r-7+7=0

We add all the numbers together, and all the variables

-2r=0

r=0/-2

r=0

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