Level 3
Taufik bought the same number of badminton rackets and shirts. The total cost of 2 badminton rackets and 1 shirt was $42. The total cost of 1 badminton racket and 2 shirts was $36. He spent a total of $234. How many badminton rackets did Taufik buy?
Level 3
Sean bought equal number of boxes of red marbles and packets of blue marbles. 3 boxes and 2 packets contain 24 marbles. 2 boxes and 3 packets contain 21 marbles. There were 108 marbles altogether. How many boxes of red marbles did Sean buy?