20=4-(n+9)

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Solution for 20=4-(n+9) equation: 



20=4-(n+9)

We move all terms to the left:

20-(4-(n+9))=0



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

4-(n+9)

determiningTheFunctionDomain
-(n+9)+4

We get rid of parentheses

-n-9+4

We add all the numbers together, and all the variables

-1n-5

Back to the equation:

-(-1n-5)



We get rid of parentheses

1n+5+20=0

We add all the numbers together, and all the variables

n+25=0

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

n=-25

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