Mark M. answered • 06/06/16

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a represents the price of an adult ticket

s represents the price of a student ticket

a + 7s = 42

6a + 12s = 132

6a + 42s = 252 multiply both sides of top equation by 6

6a + 12s = 132

30s = 120 subtract bottom from top

s = 4 divide both sides by 30

Student tickets cost $4.

You can determine the cost of an adult ticket.