Question

A rectangle's length is 12.1 more than 3 times its width. Its perimeter is 122.6. Write and solve a system of equations to find the dimensions of the rectangle.

Answer 1

Explanation:

Let width of the rectangle be y

Length of rectangle = 3y + 12.1

Perimeter = 2(L + y) = 122.6

2 (4y + 12.1 ) = 122.6

8y + 24.2 = 122.6

y = 98.4 / 8

y (width) = 12.3

Length = 49