Question 812652: A group of people bought movie tickets at the AMC Century City. They bought a total of 7 tickets, some adult and some kid tickets. They spent a total of $72. If adult tickets cost $12 and kid tickets cost $9, how much of each were purchased?
Answer by TimothyLamb(4379)   (Show Source):
You can put this solution on YOUR website! a + k = 7
a = 7 - k
12a + 9k = 72
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12a + 9k = 72
12(7 - k) + 9k = 72
84 - 3k = 72
84 - 3k = 72
3k = 12
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k = 4
a = 3
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