What minus 91 equals 87?

Here we will show you how to calculate "What minus 91 equals 87?" using simple algebra.
For the sentence, "What minus 91 equals 87?", we can make it into an algebra equation as follows:
X - 91 = 87
Then, we solve for X. To solve for X, add 91 to both sides:
X - 91 + 91 = 87 + 91
Which makes:
X = 178
Thus, the answer to "What minus 91 equals 87?" is 178 as illustrated below:
178 - 91 = 87