What two numbers add to 9 and subtract to 51?

Here we will tell you what two numbers add to 9 and subtract to 51 and prove that our answer is correct.

The two numbers that add to 9 and subtract to 51 are:

30 and -21

And here is the math to prove that our answer to "What two numbers add to 9 and subtract to 51?" is correct:

Add:
30 + (-21) = 9

Subtract:
30 - (-21) = 51

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