4n-9=2n+9

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Solution for 4n-9=2n+9 equation: 



4n-9=2n+9

We move all terms to the left:

4n-9-(2n+9)=0

We get rid of parentheses

4n-2n-9-9=0

We add all the numbers together, and all the variables

2n-18=0

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

2n=18

n=18/2

n=9

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