An adult ticket to a museum cost $3 more than the children's ticket 1 200 adult tickets and 100 children tickets are sold total revenue is 2100 was the cost of the children's ticket ?

the cost of a children’s ticket is $5

Step-by-step explanation:

Let x represent the cost of one child ticket.

Let y represent the cost of one adult ticket.

An adult ticket to a museum cost $3 more than the children's ticket. This means that

y = x + 3

when 200 adult tickets and 100 children’s tickets are sold, the total revenue is $2100. It means that

100x + 200y = 2100- - - - - - - - -1

Substituting y = x + 3 into equation 1, it becomes

100x + 200(x + 3) = 2100

100x + 200x + 600 = 2100

300x = 2100 - 600

300x = 1500

x = 1500/300

x = 5

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