-20n-(-11n)+(-9n)+15n=9

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Solution for -20n-(-11n)+(-9n)+15n=9 equation: 



-20n-(-11n)+(-9n)+15n=9

We move all terms to the left:

-20n-(-11n)+(-9n)+15n-(9)=0

We add all the numbers together, and all the variables

-5n-(-11n)+(-9n)-9=0

We get rid of parentheses

-5n+11n-9n-9=0

We add all the numbers together, and all the variables

-3n-9=0

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

-3n=9

n=9/-3

n=-3

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