9n+21=9n-45

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Solution for 9n+21=9n-45 equation: 



9n+21=9n-45

We move all terms to the left:

9n+21-(9n-45)=0

We get rid of parentheses

9n-9n+45+21=0

We add all the numbers together, and all the variables

66!=0

There is no solution for this equation

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