43 plus what equals 79?

This is how to calculate "43 plus what equals 79?" In other words, 43 plus a number equals 79. What is that number? We start by converting this word problem into an equation where "what" is what we want to solve:

43 + what = 79

To solve this equation, we first add -43 to each side of the equal sign like this:

43 - 43 + what = 79 - 43

Then, we do the calculation to get the answer to "43 plus what equals 79?" as follows:

What = 36

The answer to "43 plus what equals 79?" is 36. You know this answer is correct because 43 plus 36 equals 79.

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43 plus what equals 80?
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