109=-5+3(3+5r)

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Solution for 109=-5+3(3+5r) equation: 



109=-5+3(3+5r)

We move all terms to the left:

109-(-5+3(3+5r))=0

We add all the numbers together, and all the variables

-(-5+3(5r+3))+109=0



We calculate terms in parentheses: -(-5+3(5r+3)), so:

-5+3(5r+3)

determiningTheFunctionDomain
3(5r+3)-5

We multiply parentheses

15r+9-5

We add all the numbers together, and all the variables

15r+4

Back to the equation:

-(15r+4)



We get rid of parentheses

-15r-4+109=0

We add all the numbers together, and all the variables

-15r+105=0

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

-15r=-105

r=-105/-15

r=+7

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