Respuesta :
Answer:
49 adults; 2*49 = 98 children and (207-3*49) = 60 students.
Step-by-step explanation:
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122 children, 50 students, and 122 adults attended the movie theatre.
What is an equation?
A mathematical expression with an equality sign between two mathematical expressions is an equation.
How to solve it?
Let the number of students in the theater = x and the number of children in the theater = 2y
Since the number of adults in theater = Half of the number of children = 2y/2 = y
Given that the total seating capacity in the theater = 233
So, we can write
x + 2y + y = 233
i.e. x + 3y = 233 ...(1)
Given that the cost of 1 children's ticket = $5
i.e. the cost of 2y children tickets = 5 x (2y) = $10y
The cost of 1 student ticket = $7
i.e. the cost of x student ticket = $7x
The cost of 1 adult ticket = $12
i.e. the cost of y adult tickets = $12y
Since the total ticket sales was $1692,
So, we can write
10y + 7x + 12y = 1692
i.e. 7x + 22y = 1692 ...(2)
Now we have to solve the two equations (1) and (2).
multiplying (1) by 7,
7x + 21y = 1631 ...(3)
Subtracting (3) from (2),
7x + 22y - 7x - 21y = 1692 - 1631
i.e. y = 61
then 2y = 122
and x = 233 - (3 x 61) = 233 - 183 = 50
Therefore 122 children, 50 students, and 122 adults attended the movie theatre.
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