r-3=4r

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Solution for r-3=4r equation: 



r-3=4r

We move all terms to the left:

r-3-(4r)=0

We add all the numbers together, and all the variables

-3r-3=0

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

-3r=3

r=3/-3

r=-1

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