The length of a rectangle is three times longer than its width. The perimeter of the rectangle is 16 feet. If x represents the width of the rectangle, which equation can be used to find its value?

3x + x = 16

(3x) (x) = 16

3x + 3x + x + x = 16

3x + 3x + x = 16

3x+3x+x+x=16

Step-by-step explanation:

The length of a rectangle is three times longer than its width. The perimeter of the rectangle is 16 feet

LEt x represents the width of the rectangle

Length is 3 times longer than its width

so length of rectangle = 3x

Perimeter of rectangle = length + length + width + width

= 3x+3x+x+x

Given Perimeter = 16

So 3x+3x+x+x=16

x - width

3x - length

16 - perimeter

x + x + 3x + 3x - perimeter

Answer: 3x + 3x + x + x = 16