36 plus what equals 39?

This is how to calculate "36 plus what equals 39?" In other words, 36 plus a number equals 39. What is that number? We start by converting this word problem into an equation where "what" is what we want to solve:

36 + what = 39

To solve this equation, we first add -36 to each side of the equal sign like this:

36 - 36 + what = 39 - 36

Then, we do the calculation to get the answer to "36 plus what equals 39?" as follows:

What = 3

The answer to "36 plus what equals 39?" is 3. You know this answer is correct because 36 plus 3 equals 39.

Plus What Equals Calculator
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