(n+13)*3=7n-9

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Solution for (n+13)*3=7n-9 equation: 



(n+13)*3=7n-9

We move all terms to the left:

(n+13)*3-(7n-9)=0

We multiply parentheses

3n-(7n-9)+39=0

We get rid of parentheses

3n-7n+9+39=0

We add all the numbers together, and all the variables

-4n+48=0

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

-4n=-48

n=-48/-4

n=+12

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