5 plus what equals 45?

This is how to calculate "5 plus what equals 45?" In other words, 5 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:

5 + what = 45

To solve this equation, we first add -5 to each side of the equal sign like this:

5 - 5 + what = 45 - 5

Then, we do the calculation to get the answer to "5 plus what equals 45?" as follows:

What = 40

The answer to "5 plus what equals 45?" is 40. You know this answer is correct because 5 plus 40 equals 45.

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

5 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.