91 plus what equals 25?

This is how to calculate "91 plus what equals 25?" In other words, 91 plus a number equals 25. What is that number? We start by converting this word problem into an equation where "what" is what we want to solve:

91 + what = 25

To solve this equation, we first add -91 to each side of the equal sign like this:

91 - 91 + what = 25 - 91

Then, we do the calculation to get the answer to "91 plus what equals 25?" as follows:

What = -66

The answer to "91 plus what equals 25?" is -66. You know this answer is correct because 91 plus -66 equals 25.

Plus What Equals Calculator
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