13=r/9+8

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Solution for 13=r/9+8 equation:


13=r/9+8

We simplify the equation to the form, which is simple to understand 
13=r/9+8

We move all terms containing r to the left and all other terms to the right. 
-0.11111111111111r=+8-13

We simplify left and right side of the equation. 
-0.11111111111111r=-5

We divide both sides of the equation by -00.11111111111111 to get r. 
r=45

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