9=r/5+4

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Solution for 9=r/5+4 equation: 



9=r/5+4

We move all terms to the left:

9-(r/5+4)=0

We get rid of parentheses

-r/5-4+9=0

We multiply all the terms by the denominator


-r-4*5+9*5=0

We add all the numbers together, and all the variables

-1r+25=0

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

-r=-25

r=-25/-1

r=+25

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