What plus 9 equals 31?

This is how to calculate "What plus 9 equals 31?" In other words, what do you add to 9 to get 31? We start by converting this word problem into an equation where "What" is what we want to solve:

What + 9 = 31

To solve this equation, we first add -9 to each side of the equal sign like this:

What + 9 - 9 = 31 - 9

Then, we do the calculation to get the answer to "What plus 9 equals 31?" as follows:

What = 22

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

What Plus Calculator
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