31 plus what equals 16?

This is how to calculate "31 plus what equals 16?" In other words, 31 plus a number equals 16. What is that number? We start by converting this word problem into an equation where "what" is what we want to solve:

31 + what = 16

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

31 - 31 + what = 16 - 31

Then, we do the calculation to get the answer to "31 plus what equals 16?" as follows:

What = -15

The answer to "31 plus what equals 16?" is -15. You know this answer is correct because 31 plus -15 equals 16.

Plus What Equals Calculator
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