If Greg buys 3 shirts, 4 trousers and 2 ties, the total cost is $40. If Greg buys 7 shirts, 2 trousers and 2 ties, the total cost is $60. How much will it cost him to buy 3 trousers, 5 shirts and 2 ties?  Choose the correct choice from the following: A) $50 B) $64 C) $75 D) $96 E) Cannot be determined
Solution: 3x+4y+2z=40 7x+2y+2z=60   adding both the equations= 10x+6y+4z=100   5x+3y+2z=50   ans $50
<result>A</result>
If Greg buys 3 shirts, 4 trousers and 2 ties, the total cost is $40. If Greg buys 7 shirts, 2 trousers and 2 ties, the total cost is $60. How much will it cost him to buy 3 trousers, 5 shirts and 2 ties?