Jawaban:

Children = 1200

Adults = 800

Penjelasan dengan langkah-langkah:

Suppose:

x = numbers of children that bought ticket to the circus

y = numbers of adults that bought ticket to the circus

The cost of a ticket to the circus for children is RM25.

The cost of a ticket to the circus for adults is RM50.

Total gate revenue is RM70000.

From this information, it can be expressed in a mathematical equation:

25x + 50y = 70000

The attendance at the circus is 2000.

Then it can be expressed in a mathematical equation:

x + y = 2000

Then we got two equations:

25x + 50y = 70000 ...(1)

x + y = 2000 ...(2)

From these equations, we could determine the x and y.

We can use the eliminate and substitute.

Eliminate eq (1) dan (2) to find x

25x + 50y = 70000 (×1)

x + y = 2000 (×50)

25x + 50y = 70000

50x + 50y = 100000

_________________ −

-25x = -30000

x = 1200

To find y, substitute x = 1200 to eq (2)

x + y = 2000

1200 + y = 2000

y = 2000 − 1200

y = 800

We got

x = 1200

y = 800

Then we can conclude that on a certain day, there is 1200 children and 800 adults that bought the tickets (attend the circus).

Hope this helps.