K- 2k =?
the answer will have the letter k in it

Hi there

K - 2k = -k

Let me show my work.

In front of the letter K there is 1 which not written

so its like you had 1 - 2k
1 - 2 = -1
but there's also the letter k with it.
You write -k instead because you can't put -1k.That's not math :)

Final answer : -k 

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