R+7=7+r

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Solution for R+7=7+r equation: 



+7=7+R

We move all terms to the left:

+7-(7+R)=0

We add all the numbers together, and all the variables

-(R+7)+7=0

We get rid of parentheses

-R-7+7=0

We add all the numbers together, and all the variables

-R=0

R=0/-1

R=0

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