If Greg buys 6 shirts, 4 trousers and 2 ties, the total cost is $80. If Greg buys 4 shirts, 2 trousers and 2 ties, the total cost is $140. How much will it cost him to buy 3 trousers, 5 shirts and 2 ties?	Options:
A) $60 B) $64 C) $75 D) $110 E) Cannot be determined
Solution: 6x+4y+2z=80 4x+2y+2z=140   adding both the equations= 10x+6y+4z=220   5x+3y+2z=110   ans $110
<result>D</result>
If Greg buys 6 shirts, 4 trousers and 2 ties, the total cost is $80. If Greg buys 4 shirts, 2 trousers and 2 ties, the total cost is $140. How much will it cost him to buy 3 trousers, 5 shirts and 2 ties?