Question 302143
Let 's the length of the rectangle be "L" and the width of the rectangle be "w".

L = 7 + 2w (The length is 7m more than twice the width.)
Perimeter = 80 m 
Perimeter = 2L + 2w = 80 m

2(7+2w) + 2w = 80m 
14 + 4w + 2w = 80m
6w = 80 - 14 m
6w = 66 m
w = 66/6 m
w = 11 m

Put w = 11 into L = 7 + 2w

L = 7 + 2(11) m
L = 7 + 22 m 
L = 29 m

Answer: Length = 29m and width = 11m