18=4r+8

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Solution for 18=4r+8 equation: 



18=4r+8

We move all terms to the left:

18-(4r+8)=0

We get rid of parentheses

-4r-8+18=0

We add all the numbers together, and all the variables

-4r+10=0

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

-4r=-10

r=-10/-4

r=2+1/2

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