First find Trent’s age now.

• Wayne is 12 and is \(x\) years older than Trent
• Trent’s age now = \(12 - x\)
• Substitute \(x = 4\): Trent = \(12 - 4 = 8\)

Five years ago:
• Trent’s age = \(8 - 5 = 3\)

Final Answer: 3