4=4n-9n

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Solution for 4=4n-9n equation: 



4=4n-9n

We move all terms to the left:

4-(4n-9n)=0

We add all the numbers together, and all the variables

-(-5n)+4=0

We get rid of parentheses

5n+4=0

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

5n=-4

n=-4/5

n=-4/5

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