9n+9n=-20+8n

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Solution for 9n+9n=-20+8n equation: 



9n+9n=-20+8n

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We add all the numbers together, and all the variables

18n-(8n-20)=0

We get rid of parentheses

18n-8n+20=0

We add all the numbers together, and all the variables

10n+20=0

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

10n=-20

n=-20/10

n=-2

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