19 plus what equals 39?

This is how to calculate "19 plus what equals 39?" In other words, 19 plus a number equals 39. What is that number? We start by converting this word problem into an equation where "what" is what we want to solve:

19 + what = 39

To solve this equation, we first add -19 to each side of the equal sign like this:

19 - 19 + what = 39 - 19

Then, we do the calculation to get the answer to "19 plus what equals 39?" as follows:

What = 20

The answer to "19 plus what equals 39?" is 20. You know this answer is correct because 19 plus 20 equals 39.

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

19 plus what equals 40?
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.