The expression 3 1/2x + 18 represents the perimeter of the rectangle shown. Write an expression that represents the length of the rectangle.

Answer:
Step-by-step explanation:
height = ¼x+5
perimeter = 2(length)+2(height)
3½x + 18 = 2(length) + 2(¼x + 5)
3½x + 18 = 2(length) + ½x + 10
3x + 8 = 2(length)
length = 1½x + 4