Posted by kit kat on .
the perimeter of a rectangle is 68cm. the length is 2cm less than 3 times the width. find the length and width.

algebra 1 
Henry,
P = 68 cm.
Width = xcm.
Length = (3x  2).
P = 2x + 2(3x2) = 68 cm,
2x + 6x  4 = 68,
8x = 72,
X = 9cm.
3x  2 = 3*9  2 = 25cdm.