77 plus what equals 60?

This is how to calculate "77 plus what equals 60?" In other words, 77 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:

77 + what = 60

To solve this equation, we first add -77 to each side of the equal sign like this:

77 - 77 + what = 60 - 77

Then, we do the calculation to get the answer to "77 plus what equals 60?" as follows:

What = -17

The answer to "77 plus what equals 60?" is -17. You know this answer is correct because 77 plus -17 equals 60.

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77 plus what equals 61?
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