28 plus what equals 17?

This is how to calculate "28 plus what equals 17?" In other words, 28 plus a number equals 17. What is that number? We start by converting this word problem into an equation where "what" is what we want to solve:

28 + what = 17

To solve this equation, we first add -28 to each side of the equal sign like this:

28 - 28 + what = 17 - 28

Then, we do the calculation to get the answer to "28 plus what equals 17?" as follows:

What = -11

The answer to "28 plus what equals 17?" is -11. You know this answer is correct because 28 plus -11 equals 17.

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

28 plus what equals 18?
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.