What minus 9 equals 21?
Here we will show you how to calculate "What minus 9 equals 21?" using simple algebra.
For the sentence, "What minus 9 equals 21?", we can make it into an algebra equation as follows:
X - 9 = 21
Then, we solve for X. To solve for X, add 9 to both sides:
X - 9 + 9 = 21 + 9
Which makes:
X = 30
Thus, the answer to "What minus 9 equals 21?" is 30 as illustrated below:
30 - 9 = 21