39 plus what equals 45?

This is how to calculate "39 plus what equals 45?" In other words, 39 plus a number equals 45. What is that number? We start by converting this word problem into an equation where "what" is what we want to solve:

39 + what = 45

To solve this equation, we first add -39 to each side of the equal sign like this:

39 - 39 + what = 45 - 39

Then, we do the calculation to get the answer to "39 plus what equals 45?" as follows:

What = 6

The answer to "39 plus what equals 45?" is 6. You know this answer is correct because 39 plus 6 equals 45.

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

39 plus what equals 46?
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.