35 plus what equals 66?

This is how to calculate "35 plus what equals 66?" In other words, 35 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:

35 + what = 66

To solve this equation, we first add -35 to each side of the equal sign like this:

35 - 35 + what = 66 - 35

Then, we do the calculation to get the answer to "35 plus what equals 66?" as follows:

What = 31

The answer to "35 plus what equals 66?" is 31. You know this answer is correct because 35 plus 31 equals 66.

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35 plus what equals 67?
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