What minus 99 equals 78?

Here we will show you how to calculate "What minus 99 equals 78?" using simple algebra.
For the sentence, "What minus 99 equals 78?", we can make it into an algebra equation as follows:
X - 99 = 78
Then, we solve for X. To solve for X, add 99 to both sides:
X - 99 + 99 = 78 + 99
Which makes:
X = 177
Thus, the answer to "What minus 99 equals 78?" is 177 as illustrated below:
177 - 99 = 78