Solve the system to find how many athletes finished in each place.
Lawrence High prevailed in Saturdays track meet with the help of 20 individual-event placers earning a combined 68 points. A first place finish earns 5 points, a second place earns 3 points, and third place earns 1 point. Lawrence had a strong second-place showing, with as many second-place finshes as first and third place finishers combined.