9-5n+3n=45-78

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Solution for 9-5n+3n=45-78 equation: 



9-5n+3n=45-78

We move all terms to the left:

9-5n+3n-(45-78)=0

We add all the numbers together, and all the variables

-5n+3n+9-(-33)=0

We add all the numbers together, and all the variables

-2n+42=0

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

-2n=-42

n=-42/-2

n=+21

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