### Home > CC4 > Chapter 3 > Lesson 3.3.1 > Problem3-115

3-115.

Examine the rectangle at right. If the perimeter is 120, which equation below represents this fact? Once you have selected the appropriate equation, solve for x. Homework Help ✎

1. $2x+5+6x-1=120$

2. $4(6x-1)=120$

3. $2(6x-1)+2(2x+5)=120$

4. $(2x+5)(6x-1)=120$

 $2x+5$ $6x-1$

The equation for the perimeter is c.

2(6x − 1) + 2(2x + 5) = 120

(12x − 2) + (4x + 10) = 120

16x + 8 = 120

16x = 112

x = 7