Question 230465
You have 2 variables (Length and Width). You need to come up with 2 equations.

the perimeter is 75 feet. A rectangle is composed of 2 lengths and 2 widths.

Your equations are:

Eqn 1: 2w+2L=75
Eqn 2: 1.5w=L

Substitute Eqn 2 into Eqn 1:

2w+2(1.5w)=75
2w+3w=75
5w=75
w=15

Use Eqn 2 to find L:

1.5w=L
1.5*15=L
L=22.5

The width is 15 feet, the length is 22.5 feet.