9=4r-4(r-4)

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Solution for 9=4r-4(r-4) equation: 



9=4r-4(r-4)

We move all terms to the left:

9-(4r-4(r-4))=0



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

4r-4(r-4)

We multiply parentheses

4r-4r+16

We add all the numbers together, and all the variables

16

Back to the equation:

-(16)



We add all the numbers together, and all the variables

-7!=0

There is no solution for this equation

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