conversations.from: human
conversations.value: I need a clearer understanding of how to solve: The length of a rectangle is four times its width. If the area is 100 m2. what is the length of the rectangle?
conversations.from: assistant
conversations.value: Let L be the length and W be the width of the rectangle.
  Hence L = 4* W
  We now use the area to write 80 = L * W
  Substitute L by 4 W in the equation above 80 = 4*W × W = 4 W^2
  Solve for W and find L
  4 W^2 = 100
  W^2 = 25, W = 5 and
  L = 4*5 = 20 m