3-x=0

To solve the equation \(3 - x = 0\), you can isolate \(x\) by following these steps:

1. Add \(x\) to both sides of the equation: \[ 3 = x \]

2. Alternatively, you can subtract \(3\) from both sides: \[ -x = -3 \]

3. When you multiply both sides by \(-1\), you also isolate \(x\): \[ x = 3 \]

So, the solution is: \[ x = 3 \]