What minus 6 equals 9?

Here we will show you how to calculate "What minus 6 equals 9?" using simple algebra.
For the sentence, "What minus 6 equals 9?", we can make it into an algebra equation as follows:
X - 6 = 9
Then, we solve for X. To solve for X, add 6 to both sides:
X - 6 + 6 = 9 + 6
Which makes:
X = 15
Thus, the answer to "What minus 6 equals 9?" is 15 as illustrated below:
15 - 6 = 9