27 plus what equals 70?

This is how to calculate "27 plus what equals 70?" In other words, 27 plus a number equals 70. What is that number? We start by converting this word problem into an equation where "what" is what we want to solve:

27 + what = 70

To solve this equation, we first add -27 to each side of the equal sign like this:

27 - 27 + what = 70 - 27

Then, we do the calculation to get the answer to "27 plus what equals 70?" as follows:

What = 43

The answer to "27 plus what equals 70?" is 43. You know this answer is correct because 27 plus 43 equals 70.

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27 plus what equals 71?
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