28=4r-28

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Solution for 28=4r-28 equation: 



28=4r-28

We move all terms to the left:

28-(4r-28)=0

We get rid of parentheses

-4r+28+28=0

We add all the numbers together, and all the variables

-4r+56=0

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

-4r=-56

r=-56/-4

r=+14

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