### Home > GB8I > Chapter 3 Unit 4 > Lesson INT1: 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 $x$.

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

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

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

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

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

The equation for the perimeter is $c$.

$2(6x − 1) + 2(2x + 5) = 120$

$(12x − 2) + (4x + 10) = 120$

$16x + 8 = 120$

$16x = 112$

$x = 7$