47 plus what equals 66?

This is how to calculate "47 plus what equals 66?" In other words, 47 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:

47 + what = 66

To solve this equation, we first add -47 to each side of the equal sign like this:

47 - 47 + what = 66 - 47

Then, we do the calculation to get the answer to "47 plus what equals 66?" as follows:

What = 19

The answer to "47 plus what equals 66?" is 19. You know this answer is correct because 47 plus 19 equals 66.

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47 plus what equals 67?
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