31 plus what equals 22?

This is how to calculate "31 plus what equals 22?" In other words, 31 plus a number equals 22. What is that number? We start by converting this word problem into an equation where "what" is what we want to solve:

31 + what = 22

To solve this equation, we first add -31 to each side of the equal sign like this:

31 - 31 + what = 22 - 31

Then, we do the calculation to get the answer to "31 plus what equals 22?" as follows:

What = -9

The answer to "31 plus what equals 22?" is -9. You know this answer is correct because 31 plus -9 equals 22.

Plus What Equals Calculator
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31 plus what equals 23?
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