-65=-5(5+4r)

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Solution for -65=-5(5+4r) equation: 



-65=-5(5+4r)

We move all terms to the left:

-65-(-5(5+4r))=0

We add all the numbers together, and all the variables

-(-5(4r+5))-65=0



We calculate terms in parentheses: -(-5(4r+5)), so:

-5(4r+5)

We multiply parentheses

-20r-25

Back to the equation:

-(-20r-25)



We get rid of parentheses

20r+25-65=0

We add all the numbers together, and all the variables

20r-40=0

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

20r=40

r=40/20

r=2

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