3+2n-9=18

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Solution for 3+2n-9=18 equation: 



3+2n-9=18

We move all terms to the left:

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

We add all the numbers together, and all the variables

2n-24=0

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

2n=24

n=24/2

n=12

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