What plus 21 equals 75?

This is how to calculate "What plus 21 equals 75?" In other words, what do you add to 21 to get 75? We start by converting this word problem into an equation where "What" is what we want to solve:

What + 21 = 75

To solve this equation, we first add -21 to each side of the equal sign like this:

What + 21 - 21 = 75 - 21

Then, we do the calculation to get the answer to "What plus 21 equals 75?" as follows:

What = 54

The answer to "What plus 21 equals 75?" is 54. You know this answer is correct because 54 plus 21 equals 75.

What Plus Calculator
Here you can calculate a similar problem:

What plus 21 equals 76?
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.