40=9+4n

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Solution for 40=9+4n equation: 



40=9+4n

We move all terms to the left:

40-(9+4n)=0

We add all the numbers together, and all the variables

-(4n+9)+40=0

We get rid of parentheses

-4n-9+40=0

We add all the numbers together, and all the variables

-4n+31=0

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

-4n=-31

n=-31/-4

n=7+3/4

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