28=-4(-7+4r)

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Solution for 28=-4(-7+4r) equation: 



28=-4(-7+4r)

We move all terms to the left:

28-(-4(-7+4r))=0

We add all the numbers together, and all the variables

-(-4(4r-7))+28=0



We calculate terms in parentheses: -(-4(4r-7)), so:

-4(4r-7)

We multiply parentheses

-16r+28

Back to the equation:

-(-16r+28)



We get rid of parentheses

16r-28+28=0

We add all the numbers together, and all the variables

16r=0

r=0/16

r=0

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