ok, we know the perimeter is 510 yards perimeter is both widths plus both lengths = perimeter so we can say W is width and L is length because there are two widths and two lengths we can say 2W + 2L = 510
now...they tell us the Length is 30 yards less than twice the width We can write that as L = 2W-30
Now we plug the value we got for L into the original equation and get:
2(2W -30) + 2W = 510 distribute and simplify 4W -60 + 2W = 510 6W = 570 solve for W by dividing by 6 W = 95
So the width is 95 yards and to Find out the Length simply plug your answer for W into the equation (L= 2W-30) L = 2(95) -30 L = 160
So width is 95 and length is 160
you can check the answer by plugging into original equation of 2W+2L = 510
