25 plus what equals 12?

This is how to calculate "25 plus what equals 12?" In other words, 25 plus a number equals 12. What is that number? We start by converting this word problem into an equation where "what" is what we want to solve:

25 + what = 12

To solve this equation, we first add -25 to each side of the equal sign like this:

25 - 25 + what = 12 - 25

Then, we do the calculation to get the answer to "25 plus what equals 12?" as follows:

What = -13

The answer to "25 plus what equals 12?" is -13. You know this answer is correct because 25 plus -13 equals 12.

Plus What Equals Calculator
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