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

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



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

We move all terms to the left:

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

We add all the numbers together, and all the variables

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



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

-1-4(-7r+1)

determiningTheFunctionDomain
-4(-7r+1)-1

We multiply parentheses

28r-4-1

We add all the numbers together, and all the variables

28r-5

Back to the equation:

-(28r-5)



We get rid of parentheses

-28r+5-89=0

We add all the numbers together, and all the variables

-28r-84=0

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

-28r=84

r=84/-28

r=-3

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