85=-3-8(r-8)

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Solution for 85=-3-8(r-8) equation: 



85=-3-8(r-8)

We move all terms to the left:

85-(-3-8(r-8))=0



We calculate terms in parentheses: -(-3-8(r-8)), so:

-3-8(r-8)

determiningTheFunctionDomain
-8(r-8)-3

We multiply parentheses

-8r+64-3

We add all the numbers together, and all the variables

-8r+61

Back to the equation:

-(-8r+61)



We get rid of parentheses

8r-61+85=0

We add all the numbers together, and all the variables

8r+24=0

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

8r=-24

r=-24/8

r=-3

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