99 plus what equals 57?

This is how to calculate "99 plus what equals 57?" In other words, 99 plus a number equals 57. What is that number? We start by converting this word problem into an equation where "what" is what we want to solve:

99 + what = 57

To solve this equation, we first add -99 to each side of the equal sign like this:

99 - 99 + what = 57 - 99

Then, we do the calculation to get the answer to "99 plus what equals 57?" as follows:

What = -42

The answer to "99 plus what equals 57?" is -42. You know this answer is correct because 99 plus -42 equals 57.

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

99 plus what equals 58?
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.