Question 793256
length = 2w - 5
width = w
perimeter = 50

2(2w - 5) + 2w = 50
4w - 10 + 2w = 50
6w - 10 = 50
6w - 10 + 10 = 50 + 10
6w = 60
6w/6 = 60/6
w = 10

check:
2(2(10) - 5) + 2(10) = 50
2(20 - 5) + 20 = 50
2(15) + 20 = 50
30 + 20 = 50
50 = 50