28=4r-8

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Solution for 28=4r-8 equation: 



28=4r-8

We move all terms to the left:

28-(4r-8)=0

We get rid of parentheses

-4r+8+28=0

We add all the numbers together, and all the variables

-4r+36=0

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

-4r=-36

r=-36/-4

r=+9

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