Question 842620: A picture frame has a perimeter of 100 cm. Its width is 4 cm less than twice its length. What is the width of the picture frame? Answer by thejackal(72) (Show Source):
You can put this solution on YOUR website! perimeter P = 2w + 2l where w is width and l is length
if w = 2l - 4 as said in the question then
P = 2(2l - 4) + 2l
P = 4l - 8 + 2l
P = 6l - 8
thus
100 = 6l - 8
100 + 8 = 6l
108 = 6l
108/6 = l = 18
thus w = 2(18) - 4 = 36 - 4 = 32
