11 plus what equals 9?

This is how to calculate "11 plus what equals 9?" In other words, 11 plus a number equals 9. What is that number? We start by converting this word problem into an equation where "what" is what we want to solve:

11 + what = 9

To solve this equation, we first add -11 to each side of the equal sign like this:

11 - 11 + what = 9 - 11

Then, we do the calculation to get the answer to "11 plus what equals 9?" as follows:

What = -2

The answer to "11 plus what equals 9?" is -2. You know this answer is correct because 11 plus -2 equals 9.

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

11 plus what equals 10?
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.