Solving the Question
We're given:
- Area (garden) = 4(5.5x + 1.5)
- Area (garden + walkway) = 4.5(8x + 4)
To find the area of the garden alone, we can subtract the area of the garden from the combined area of the garden and walkway:

Open up the parentheses:

Combine like terms:

Answer
The area of the walkway around the garden is 14x + 12.