What plus 6 equals 15?

This is how to calculate "What plus 6 equals 15?" In other words, what do you add to 6 to get 15? We start by converting this word problem into an equation where "What" is what we want to solve:

What + 6 = 15

To solve this equation, we first add -6 to each side of the equal sign like this:

What + 6 - 6 = 15 - 6

Then, we do the calculation to get the answer to "What plus 6 equals 15?" as follows:

What = 9

The answer to "What plus 6 equals 15?" is 9. You know this answer is correct because 9 plus 6 equals 15.

What Plus Calculator
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