Question 796067
length (L) = 2w + 75
width = w
perimeter = 330
p = 2w + 2L
2w + 2(2w + 75) = 330
2w + 4w + 150 = 330
6w + 150 - 150 = 330 - 150
6w = 180
6w/6 = 180/6 
w = 30

check:
2(30) + 2(2(30) + 75) = 330
60 + 2(60 + 75) = 330
60 + 2(135) = 330
60 + 270 = 330
330 = 330