- Let y represent the width of a rectangle and let x represent the rectangle's lengu.
length of the rectangle is three less than four times its width and the perimeter is
54 centimeters.
Write a system of equations and solve them to find the dimensions of the rectangle.

Length: 21 cm and Width:  6cm

Step-by-step explanation:

Let be the width and length of the rectangle. We know:

-------- eq. 1

   (Perimeter of the rectangle) ------- eq.  2

Substitute equation 1 in equation 2:

Using the value of y, we find x.

ca = ec

cpctc makes it so that corresponding parts of the triangle you proved to be equal are equal, the other options aren't part of the part of the triangles you proved to be equal.