-2n+9n=15n-20-7n

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Solution for -2n+9n=15n-20-7n equation: 



-2n+9n=15n-20-7n

We move all terms to the left:

-2n+9n-(15n-20-7n)=0

We add all the numbers together, and all the variables

-2n+9n-(8n-20)=0

We add all the numbers together, and all the variables

7n-(8n-20)=0

We get rid of parentheses

7n-8n+20=0

We add all the numbers together, and all the variables

-1n+20=0

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

-n=-20

n=-20/-1

n=+20

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