-9=r/2-13

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Solution for -9=r/2-13 equation: 



-9=r/2-13

We move all terms to the left:

-9-(r/2-13)=0

We get rid of parentheses

-r/2+13-9=0

We multiply all the terms by the denominator


-r+13*2-9*2=0

We add all the numbers together, and all the variables

-1r+8=0

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

-r=-8

r=-8/-1

r=+8

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