90 plus what equals 59?

This is how to calculate "90 plus what equals 59?" In other words, 90 plus a number equals 59. What is that number? We start by converting this word problem into an equation where "what" is what we want to solve:

90 + what = 59

To solve this equation, we first add -90 to each side of the equal sign like this:

90 - 90 + what = 59 - 90

Then, we do the calculation to get the answer to "90 plus what equals 59?" as follows:

What = -31

The answer to "90 plus what equals 59?" is -31. You know this answer is correct because 90 plus -31 equals 59.

Plus What Equals Calculator
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90 plus what equals 60?
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