10 plus what equals 8?

This is how to calculate "10 plus what equals 8?" In other words, 10 plus a number equals 8. What is that number? We start by converting this word problem into an equation where "what" is what we want to solve:

10 + what = 8

To solve this equation, we first add -10 to each side of the equal sign like this:

10 - 10 + what = 8 - 10

Then, we do the calculation to get the answer to "10 plus what equals 8?" as follows:

What = -2

The answer to "10 plus what equals 8?" is -2. You know this answer is correct because 10 plus -2 equals 8.

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

10 plus what equals 9?
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.