8r-5=9r

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Solution for 8r-5=9r equation: 



8r-5=9r

We move all terms to the left:

8r-5-(9r)=0

We add all the numbers together, and all the variables

-1r-5=0

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

-r=5

r=5/-1

r=-5

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