(5-7)n=42

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Solution for (5-7)n=42 equation: 



(5-7)n=42

We move all terms to the left:

(5-7)n-(42)=0

We add all the numbers together, and all the variables

(-2)n-42=0

We multiply parentheses

-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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