Let's solve the equation step by step.
The given equation is: \[ 1.5m + 9 = 48 \]
Step 1: Subtract 9 from both sides of the equation. \[ 1.5m + 9 - 9 = 48 - 9 \] This simplifies to: \[ 1.5m = 39 \]
Step 2: Divide both sides by 1.5. \[ m = \frac{39}{1.5} \]
Now, let's calculate \( \frac{39}{1.5} \): \[ m = 26 \]
So, it will take Trent 26 minutes to fill his fish tank.