4=5n-9n

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Solution for 4=5n-9n equation: 



4=5n-9n

We move all terms to the left:

4-(5n-9n)=0

We add all the numbers together, and all the variables

-(-4n)+4=0

We get rid of parentheses

4n+4=0

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

4n=-4

n=-4/4

n=-1

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