23 plus what equals 20?

This is how to calculate "23 plus what equals 20?" In other words, 23 plus a number equals 20. What is that number? We start by converting this word problem into an equation where "what" is what we want to solve:

23 + what = 20

To solve this equation, we first add -23 to each side of the equal sign like this:

23 - 23 + what = 20 - 23

Then, we do the calculation to get the answer to "23 plus what equals 20?" as follows:

What = -3

The answer to "23 plus what equals 20?" is -3. You know this answer is correct because 23 plus -3 equals 20.

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

23 plus what equals 21?
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.