7r-5r+4=8r+4-r

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Solution for 7r-5r+4=8r+4-r equation: 



7r-5r+4=8r+4-r

We move all terms to the left:

7r-5r+4-(8r+4-r)=0

We add all the numbers together, and all the variables

7r-5r-(7r+4)+4=0

We add all the numbers together, and all the variables

2r-(7r+4)+4=0

We get rid of parentheses

2r-7r-4+4=0

We add all the numbers together, and all the variables

-5r=0

r=0/-5

r=0

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