7r-1=2r+9

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Solution for 7r-1=2r+9 equation: 



7r-1=2r+9

We move all terms to the left:

7r-1-(2r+9)=0

We get rid of parentheses

7r-2r-9-1=0

We add all the numbers together, and all the variables

5r-10=0

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

5r=10

r=10/5

r=2

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