59 plus what equals 66?

This is how to calculate "59 plus what equals 66?" In other words, 59 plus a number equals 66. What is that number? We start by converting this word problem into an equation where "what" is what we want to solve:

59 + what = 66

To solve this equation, we first add -59 to each side of the equal sign like this:

59 - 59 + what = 66 - 59

Then, we do the calculation to get the answer to "59 plus what equals 66?" as follows:

What = 7

The answer to "59 plus what equals 66?" is 7. You know this answer is correct because 59 plus 7 equals 66.

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59 plus what equals 67?
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