Abuilding in a city has a rectangular base. the length of the base measures 70 ft less than three times the width. the perimeter of this base is 940 ft. what are the dimensions of the base?

Data:
Perimeter = 940 ft
width = w
lenght (l) = 3*w - 70

Solving:
3w - 70 + w + 3w - 70 + w = 940
3w + 3w + w + w = 940 + 70 + 70
8w = 1080



Soon: lenght (l) = 3*w - 70
l = 3w - 70
l = 3*135 - 70
l = 405 - 70


dimensions of the base: 135 widht and 335 lenght

Note: (Real test)
Perimeter: 135+135+335+335 = 940 (TRUE)