Question

Three DVDs and four CDs cost $92. Two DVDs and three CDs cost

$65. Find the cost of each tape and CD.

Answer 1

DVD: $16

CD: $11

Explanation:

These two linear equations can represent the system of equations where x equals the cost of a DVD and y equals the cost of a CD:

3x+4y=92

2x+3y=65

When graphed, the solution is at (16,11).

Therefore, one DVD costs $16 and one CD costs $11.