Calculate, in yards, the length of the rectangular playing field. Perimeter = 424 yrds Width = 52 yrds
L = Length
W = Width
P = Perimeter
P = 2 L + 2 W
P = 2 ( L + W )
424 = 2 ( L + 52 )
Divide both sides by 2
212 = L + 52
Subtract 52 to both sides
160 = L
L = 160 yd