What plus 3 equals 20?

This is how to calculate "What plus 3 equals 20?" In other words, what do you add to 3 to get 20? We start by converting this word problem into an equation where "What" is what we want to solve:

What + 3 = 20

To solve this equation, we first add -3 to each side of the equal sign like this:

What + 3 - 3 = 20 - 3

Then, we do the calculation to get the answer to "What plus 3 equals 20?" as follows:

What = 17

The answer to "What plus 3 equals 20?" is 17. You know this answer is correct because 17 plus 3 equals 20.

What Plus Calculator
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What plus 3 equals 21?
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