r-4r=4.5

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Solution for r-4r=4.5 equation: 



r-4r=4.5

We move all terms to the left:

r-4r-(4.5)=0

We add all the numbers together, and all the variables

-3r-4.5=0

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

-3r=4.5

r=4.5/-3

r=-1+1/2

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