-4+8r=9r

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Solution for -4+8r=9r equation: 



-4+8r=9r

We move all terms to the left:

-4+8r-(9r)=0

We add all the numbers together, and all the variables

-1r-4=0

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

-r=4

r=4/-1

r=-4

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