50 plus what equals 78?

This is how to calculate "50 plus what equals 78?" In other words, 50 plus a number equals 78. What is that number? We start by converting this word problem into an equation where "what" is what we want to solve:

50 + what = 78

To solve this equation, we first add -50 to each side of the equal sign like this:

50 - 50 + what = 78 - 50

Then, we do the calculation to get the answer to "50 plus what equals 78?" as follows:

What = 28

The answer to "50 plus what equals 78?" is 28. You know this answer is correct because 50 plus 28 equals 78.

Plus What Equals Calculator
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50 plus what equals 79?
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