X-1=2

To solve the equation \(X - 1 = 2\), you simply need to isolate \(X\).

1. Add 1 to both sides of the equation:

   \[ X - 1 + 1 = 2 + 1 \]

   This simplifies to:

   \[ X = 3 \]

So, the solution is \(X = 3\).