Problema Solution
The Alexanders bought 9 movie tickets for a total cost of $30. Each child's ticket cost $@ and each adult's ticket cost $4. How many children's tickets did the Alexanders buy?
Answer provided by our tutors
we assume that "child's ticket cost $@" is intended to be "child's ticket cost $2"
let 'x' represent the number of child tickets, then '9-x' represents the number of adult tickets
30 = 2.x + 4.(9-x)
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x=3
9-3=6
3 tickets were purchased by the Alexanders (6 adults were purchased)