What minus 4 equals 81?

Here we will show you how to calculate "What minus 4 equals 81?" using simple algebra.
For the sentence, "What minus 4 equals 81?", we can make it into an algebra equation as follows:
X - 4 = 81
Then, we solve for X. To solve for X, add 4 to both sides:
X - 4 + 4 = 81 + 4
Which makes:
X = 85
Thus, the answer to "What minus 4 equals 81?" is 85 as illustrated below:
85 - 4 = 81