The perimeter of the rectangle is 104 units. Find the length of side CD without variables. CD= 3Y+2 DA= 4Y +1
The rectangle has two pairs of sides that are equal, so we will write the equation of the perimeter.
2 * (3Y+2) + 2*(4Y+1) = 104
6Y + 4 + 8Y+2 = 104
Now plug our value for Y into the two side equations and find out the length of each side.