What minus 81 equals 90?
Here we will show you how to calculate "What minus 81 equals 90?" using simple algebra.
For the sentence, "What minus 81 equals 90?", we can make it into an algebra equation as follows:
X - 81 = 90
Then, we solve for X. To solve for X, add 81 to both sides:
X - 81 + 81 = 90 + 81
Which makes:
X = 171
Thus, the answer to "What minus 81 equals 90?" is 171 as illustrated below:
171 - 81 = 90