The length of a rectangle is three centimeters more than twice the width. The perimeter is 78 centimeters. Define a variable and write and solve an equation to find out how long and wide the rectangle is?
L = 2w + 3 The perimeter equation is: 2L + 2W = 78 Put what L equals in to find w: 2(2w + 3) + 2w = 78 6w + 6 = 78 ( I did a short cut) 6w = 72 6w/6 = 72/6 W = 12 At this point, put width back into the first equation to find the length L = 2(12) + 3 L = 27
