Set up and solve a system of equations

The school that Joe goes to is selling tickets to a spring musical. On the first day of ticket sales the school sold 12 adult tickets and 2 child for a total of $122. The school took $160 on the second day by selling 7 adult tickets and 8 child tickets. What is the price each of one adult ticket and one child ticket?

1 answer

12a+2c = 122
7a+8c = 160

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