91 plus what equals 89?

This is how to calculate "91 plus what equals 89?" In other words, 91 plus a number equals 89. What is that number? We start by converting this word problem into an equation where "what" is what we want to solve:

91 + what = 89

To solve this equation, we first add -91 to each side of the equal sign like this:

91 - 91 + what = 89 - 91

Then, we do the calculation to get the answer to "91 plus what equals 89?" as follows:

What = -2

The answer to "91 plus what equals 89?" is -2. You know this answer is correct because 91 plus -2 equals 89.

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

91 plus what equals 90?
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.