49 plus what equals 80?

This is how to calculate "49 plus what equals 80?" In other words, 49 plus a number equals 80. What is that number? We start by converting this word problem into an equation where "what" is what we want to solve:

49 + what = 80

To solve this equation, we first add -49 to each side of the equal sign like this:

49 - 49 + what = 80 - 49

Then, we do the calculation to get the answer to "49 plus what equals 80?" as follows:

What = 31

The answer to "49 plus what equals 80?" is 31. You know this answer is correct because 49 plus 31 equals 80.

Plus What Equals Calculator
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49 plus what equals 81?
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