99 plus what equals 99?

This is how to calculate "99 plus what equals 99?" In other words, 99 plus a number equals 99. What is that number? We start by converting this word problem into an equation where "what" is what we want to solve:

99 + what = 99

To solve this equation, we first add -99 to each side of the equal sign like this:

99 - 99 + what = 99 - 99

Then, we do the calculation to get the answer to "99 plus what equals 99?" as follows:

What = 0

The answer to "99 plus what equals 99?" is 0. You know this answer is correct because 99 plus 0 equals 99.

Plus What Equals Calculator
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0 plus what equals 0?
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