What two numbers add to 1 and subtract to 21?

Here we will tell you what two numbers add to 1 and subtract to 21 and prove that our answer is correct.

The two numbers that add to 1 and subtract to 21 are:

11 and -10

And here is the math to prove that our answer to "What two numbers add to 1 and subtract to 21?" is correct:

Add:
11 + (-10) = 1

Subtract:
11 - (-10) = 21

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