4 times what equals 21?

4 times what equals 21? In other words, what do you multiply by 4 to get 21? If "x" is "what" in the sentence, "4 times what equals 21?", then the equation to solve the problem is as follows:

4 • x = 21

Which can be written as:

4x = 21

To solve the equation above, we need to remove the 4 on the left side to make the x alone. To do that, we divide both sides by 4.

4x/4 = 21/4

4x/4 is x and 21/4 is 5.25 which means our equation will look like this:

x = 5.25

Thus, the answer to "4 times what equals 21?" is 5.25.

To double-check our work, multiply 5.25 by 4 to see that it equals 21. (Note that our answer on this page is rounded to 4 digits if necessary.)

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4 times what equals 22?
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