Math word problem
posted by Anonymous .
At an amusement park, players can sue tickets that they won playing skeeball and other games to trade for prizes. Each ticket is worth 3, 7, or 15 points. If you can trade 10 15point tickets for x pairs of xray goggles, how many pairs of xray goggles can you trade for s 7point and t 3point tickets?

10*15 = 150
(7s+3t)/150