9-5=4r

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Solution for 9-5=4r equation: 



9-5=4r

We move all terms to the left:

9-5-(4r)=0

We add all the numbers together, and all the variables

-4r+4=0

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

-4r=-4

r=-4/-4

r=1

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