31 plus what equals 77?

This is how to calculate "31 plus what equals 77?" In other words, 31 plus a number equals 77. What is that number? We start by converting this word problem into an equation where "what" is what we want to solve:

31 + what = 77

To solve this equation, we first add -31 to each side of the equal sign like this:

31 - 31 + what = 77 - 31

Then, we do the calculation to get the answer to "31 plus what equals 77?" as follows:

What = 46

The answer to "31 plus what equals 77?" is 46. You know this answer is correct because 31 plus 46 equals 77.

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

31 plus what equals 78?
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.