Answer:
26x +5
Step-by-step explanation:
To find a perimeter, you need to add the length of all lines. In this picture, we don't know the length of the vertical line on the left and horizontal line on the bottom yet.
The vertical line on the left should be equal to the sum of two vertical lines on the right, 3x and 3x. The length will be: 3x + 3x = 6x
The horizontal line on the bottom should be equal to the sum of two horizontal lines on top, 3x and (4x+5). The length will be: 3x + 4x +5= 7x +5
The perimeter will be: 3x + 3x + 4x+5 + 3x + 7x+5 +6x= 26x +5
