18-r=4r

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Solution for 18-r=4r equation: 



18-r=4r

We move all terms to the left:

18-r-(4r)=0

We add all the numbers together, and all the variables

-5r+18=0

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

-5r=-18

r=-18/-5

r=3+3/5

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