63 plus what equals 9?

This is how to calculate "63 plus what equals 9?" In other words, 63 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:

63 + what = 9

To solve this equation, we first add -63 to each side of the equal sign like this:

63 - 63 + what = 9 - 63

Then, we do the calculation to get the answer to "63 plus what equals 9?" as follows:

What = -54

The answer to "63 plus what equals 9?" is -54. You know this answer is correct because 63 plus -54 equals 9.

Plus What Equals Calculator
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63 plus what equals 10?
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