9+(8+n)=20

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Solution for 9+(8+n)=20 equation: 



9+(8+n)=20

We move all terms to the left:

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

We add all the numbers together, and all the variables

(n+8)+9-20=0

We add all the numbers together, and all the variables

(n+8)-11=0

We get rid of parentheses

n+8-11=0

We add all the numbers together, and all the variables

n-3=0

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

n=3

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