Question 252596
A rectangle is three times as long as it is wide.
 The perimeter is 40 feet.
 Find the width.
:
Let x = the width
then
3x = the length
:
The perimeter
2L = 2W = 40
so we have:
2(3x) + 2x = 40
6x + 2x = 40
8x = 40
x = {{{40/8}}}
x = 5 ft is the width
;
;
Check:
2(15) + 2(5) = 40