
This is how to calculate "15 plus what equals 23?" In other words, 15 plus a number equals 23. What is that number? We start by converting this word problem into an equation where "what" is what we want to solve:
15 + what = 23
To solve this equation, we first add -15 to each side of the equal sign like this:
15 - 15 + what = 23 - 15
Then, we do the calculation to get the answer to "15 plus what equals 23?" as follows:
What = 8
The answer to "15 plus what equals 23?" is 8. You know this answer is correct because 15 plus 8 equals 23.
15 plus what equals 24?
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