9=-2+r/5

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Solution for 9=-2+r/5 equation: 



9=-2+r/5

We move all terms to the left:

9-(-2+r/5)=0

We add all the numbers together, and all the variables

-(r/5-2)+9=0

We get rid of parentheses

-r/5+2+9=0

We multiply all the terms by the denominator


-r+2*5+9*5=0

We add all the numbers together, and all the variables

-1r+55=0

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

-r=-55

r=-55/-1

r=+55

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