
This is how to calculate "45 plus what equals 43?" In other words, 45 plus a number equals 43. What is that number? We start by converting this word problem into an equation where "what" is what we want to solve:
45 + what = 43
To solve this equation, we first add -45 to each side of the equal sign like this:
45 - 45 + what = 43 - 45
Then, we do the calculation to get the answer to "45 plus what equals 43?" as follows:
What = -2
The answer to "45 plus what equals 43?" is -2. You know this answer is correct because 45 plus -2 equals 43.
45 plus what equals 44?
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