Answer:
Area expression: 24

Perimeter expression: 20x
Explanation:
Step 1: Finding Area
area = length * breadth
area = 6x * 4x
area = 24

Therefore, the expression for finding the area is 24

Step 2: Finding Perimeter
perimeter = length + length + breadth + breadth
perimeter = 6x + 6x + 4x + 4x
perimeter = 12x + 8x
perimeter = 20x
Therefore, the expression for finding the perimeter is 20x