21 divided by what equals 39?

21 divided by what equals 39? In other words, you have 21 and you divide it by something and then you get 39. What is that something?

We will call that something "X". Here is the equation to find the solution:

		21
		X

= 39

First, multiply both sides by X to get rid of the X as denominator.

		21(X)
		X

= 39(X)

21 = 39X

Then, divide both sides by 39 to get X by itself as follows:

		21
		39

		39X
		39

0.538 = X

Thus, the answer to "21 divided by what equals 39?" is 0.538.

Note that our answers are rounded to the nearest thousandth if necessary. You can divide 21 by 0.538 to check that we got the right answer.

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