-89=-1-4(7+3r)

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Solution for -89=-1-4(7+3r) equation: 



-89=-1-4(7+3r)

We move all terms to the left:

-89-(-1-4(7+3r))=0

We add all the numbers together, and all the variables

-(-1-4(3r+7))-89=0



We calculate terms in parentheses: -(-1-4(3r+7)), so:

-1-4(3r+7)

determiningTheFunctionDomain
-4(3r+7)-1

We multiply parentheses

-12r-28-1

We add all the numbers together, and all the variables

-12r-29

Back to the equation:

-(-12r-29)



We get rid of parentheses

12r+29-89=0

We add all the numbers together, and all the variables

12r-60=0

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

12r=60

r=60/12

r=5

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