What plus 8 equals 7?

This is how to calculate "What plus 8 equals 7?" In other words, what do you add to 8 to get 7? We start by converting this word problem into an equation where "What" is what we want to solve:

What + 8 = 7

To solve this equation, we first add -8 to each side of the equal sign like this:

What + 8 - 8 = 7 - 8

Then, we do the calculation to get the answer to "What plus 8 equals 7?" as follows:

What = -1

The answer to "What plus 8 equals 7?" is -1. You know this answer is correct because -1 plus 8 equals 7.

What Plus Calculator
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