(r+3)=r-4

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Solution for (r+3)=r-4 equation: 



(r+3)=r-4

We move all terms to the left:

(r+3)-(r-4)=0

We get rid of parentheses

r-r+3+4=0

We add all the numbers together, and all the variables

7!=0

There is no solution for this equation

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