Answer:
Step-by-step explanation:
You want to know the price of each kind of ticket when 4 adult and 8 child tickets cost $144, and 6 adult and 4 child tickets cost $136.
We can use an equation to describe each of the purchases:
4a +8c = 144
6a +4c = 136
We can divide the first equation by 2 and subtract it from the second:
(6a +4c) -1/2(4a +8c) = (136) -1/2(144)
4a = 64 . . . . . . . simplify
a = 16
Using this value in the second equation gives ...
6·16 +4c = 136
4c = 40 . . . . . . . subtract 96
c = 10
The price for an adult ticket was $16; for a child ticket, $10.
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