6 plus what equals 9?

This is how to calculate "6 plus what equals 9?" In other words, 6 plus a number equals 9. What is that number? We start by converting this word problem into an equation where "what" is what we want to solve:

6 + what = 9

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

6 - 6 + what = 9 - 6

Then, we do the calculation to get the answer to "6 plus what equals 9?" as follows:

What = 3

The answer to "6 plus what equals 9?" is 3. You know this answer is correct because 6 plus 3 equals 9.

Plus What Equals Calculator
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6 plus what equals 10?
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