Oh, dude, 3n just means you take the number 3 and multiply it by n. It's like when you order three times the amount of fries because you're extra hungry. So, if n is 2, then 3n would be 6. Easy peasy, right?
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In mathematics, the expression 3n represents a multiple of 3, where n is a variable that can take on any integer value. When you multiply 3 by n, you are essentially scaling the number 3 by the value of n. For example, if n = 2, then 3n would equal 6, as 3 multiplied by 2 is 6.
Well, darling, "3n" is just a mathematical expression that means "three times n." It's as simple as that. So if you're feeling a bit puzzled by it, just remember that it's like saying "three apples" or "three cats" - just replace the word with a variable, honey. Math can be a real hoot once you get the hang of it!