12=9+4(y+3)

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Solution for 12=9+4(y+3) equation: 



12=9+4(y+3)

We move all terms to the left:

12-(9+4(y+3))=0



We calculate terms in parentheses: -(9+4(y+3)), so:

9+4(y+3)

determiningTheFunctionDomain
4(y+3)+9

We multiply parentheses

4y+12+9

We add all the numbers together, and all the variables

4y+21

Back to the equation:

-(4y+21)



We get rid of parentheses

-4y-21+12=0

We add all the numbers together, and all the variables

-4y-9=0

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

-4y=9

y=9/-4

y=-2+1/4

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