68 plus what equals 81?

This is how to calculate "68 plus what equals 81?" In other words, 68 plus a number equals 81. What is that number? We start by converting this word problem into an equation where "what" is what we want to solve:

68 + what = 81

To solve this equation, we first add -68 to each side of the equal sign like this:

68 - 68 + what = 81 - 68

Then, we do the calculation to get the answer to "68 plus what equals 81?" as follows:

What = 13

The answer to "68 plus what equals 81?" is 13. You know this answer is correct because 68 plus 13 equals 81.

Plus What Equals Calculator
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68 plus what equals 82?
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