28=4(r-85)

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Solution for 28=4(r-85) equation: 



28=4(r-85)

We move all terms to the left:

28-(4(r-85))=0



We calculate terms in parentheses: -(4(r-85)), so:

4(r-85)

We multiply parentheses

4r-340

Back to the equation:

-(4r-340)



We get rid of parentheses

-4r+340+28=0

We add all the numbers together, and all the variables

-4r+368=0

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

-4r=-368

r=-368/-4

r=+92

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