5r-7=9+r

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Solution for 5r-7=9+r equation: 



5r-7=9+r

We move all terms to the left:

5r-7-(9+r)=0

We add all the numbers together, and all the variables

5r-(r+9)-7=0

We get rid of parentheses

5r-r-9-7=0

We add all the numbers together, and all the variables

4r-16=0

We move all terms containing r to the left, all other terms to the right

4r=16

r=16/4

r=4

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