3n+9=(-18)

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



3n+9=(-18)

We move all terms to the left:

3n+9-((-18))=0

We add all the numbers together, and all the variables

3n+27=0

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

3n=-27

n=-27/3

n=-9

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