What plus 6 equals 90?

This is how to calculate "What plus 6 equals 90?" In other words, what do you add to 6 to get 90? We start by converting this word problem into an equation where "What" is what we want to solve:

What + 6 = 90

To solve this equation, we first add -6 to each side of the equal sign like this:

What + 6 - 6 = 90 - 6

Then, we do the calculation to get the answer to "What plus 6 equals 90?" as follows:

What = 84

The answer to "What plus 6 equals 90?" is 84. You know this answer is correct because 84 plus 6 equals 90.

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What plus 6 equals 91?
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