30=-2+9(r+4)

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Solution for 30=-2+9(r+4) equation: 



30=-2+9(r+4)

We move all terms to the left:

30-(-2+9(r+4))=0



We calculate terms in parentheses: -(-2+9(r+4)), so:

-2+9(r+4)

determiningTheFunctionDomain
9(r+4)-2

We multiply parentheses

9r+36-2

We add all the numbers together, and all the variables

9r+34

Back to the equation:

-(9r+34)



We get rid of parentheses

-9r-34+30=0

We add all the numbers together, and all the variables

-9r-4=0

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

-9r=4

r=4/-9

r=-4/9

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