Stephen has discovered a blow-out sale at the music store in the mall. The cost of 3 sets of guitar strings, 2 guitars, and 2 amps is $472. The cost of 2 sets of guitar strings and 1 guitar is $322. The cost
of 4 sets of strings and 1 amp is $295. If x represents sets of guitar strings, y represents guitars, and z
represents amps, write a systems of equations can be used to determine the sale price of the sets of
strings, the guitars, and the amps?