-18=-2+3(a+9)

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Solution for -18=-2+3(a+9) equation: 



-18=-2+3(a+9)

We move all terms to the left:

-18-(-2+3(a+9))=0



We calculate terms in parentheses: -(-2+3(a+9)), so:

-2+3(a+9)

determiningTheFunctionDomain
3(a+9)-2

We multiply parentheses

3a+27-2

We add all the numbers together, and all the variables

3a+25

Back to the equation:

-(3a+25)



We get rid of parentheses

-3a-25-18=0

We add all the numbers together, and all the variables

-3a-43=0

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

-3a=43

a=43/-3

a=-14+1/3

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