-9=4r-5r

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Solution for -9=4r-5r equation: 



-9=4r-5r

We move all terms to the left:

-9-(4r-5r)=0

We add all the numbers together, and all the variables

-(-1r)-9=0

We get rid of parentheses

1r-9=0

We add all the numbers together, and all the variables

r-9=0

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

r=9

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