The length of a rectangle is 3 times the width. The area is 48 square feet. Find the length and width of the rectangle.

**x = width**

3x = length{length is 3 times the width}

3x = length

**Area of a rectangle = length x width**

x(3x) = 48 {substituted length and width into area formula}

3x² = 48 {multiplied}

x² = 16 {divided each side by 3}

x = 4 or -4 {took square root of each side}

x = 4 {width cannot be negative}

3x = 12 {substituted 4, in for x, into 3x}

**width = 4 ft**

length = 12 ft

length = 12 ft

*- Algebra House*