9 plus what equals 60?

This is how to calculate "9 plus what equals 60?" In other words, 9 plus a number equals 60. What is that number? We start by converting this word problem into an equation where "what" is what we want to solve:

9 + what = 60

To solve this equation, we first add -9 to each side of the equal sign like this:

9 - 9 + what = 60 - 9

Then, we do the calculation to get the answer to "9 plus what equals 60?" as follows:

What = 51

The answer to "9 plus what equals 60?" is 51. You know this answer is correct because 9 plus 51 equals 60.

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9 plus what equals 61?
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