31 plus what equals 50?

This is how to calculate "31 plus what equals 50?" In other words, 31 plus a number equals 50. What is that number? We start by converting this word problem into an equation where "what" is what we want to solve:

31 + what = 50

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

31 - 31 + what = 50 - 31

Then, we do the calculation to get the answer to "31 plus what equals 50?" as follows:

What = 19

The answer to "31 plus what equals 50?" is 19. You know this answer is correct because 31 plus 19 equals 50.

Plus What Equals Calculator
Here you can calculate a similar problem:

31 plus what equals 51?
Do you think you can solve a similar problem on your own? Try to figure out the next problem on our list and then go here to check the answer.