What plus 30 equals 72?

This is how to calculate "What plus 30 equals 72?" In other words, what do you add to 30 to get 72? We start by converting this word problem into an equation where "What" is what we want to solve:

What + 30 = 72

To solve this equation, we first add -30 to each side of the equal sign like this:

What + 30 - 30 = 72 - 30

Then, we do the calculation to get the answer to "What plus 30 equals 72?" as follows:

What = 42

The answer to "What plus 30 equals 72?" is 42. You know this answer is correct because 42 plus 30 equals 72.

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What plus 30 equals 73?
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