Answer:
[tex]40x+25y=19,000[/tex]
Step-by-step explanation:
[tex]x[/tex] denotes the number of adult admission tickets sold and [tex]y[/tex] denotes the number of child admission tickets sold.
Cost of an adult admission ticket = $40
Cost of [tex]x[/tex] adult admission tickets = $40[tex]x[/tex]
Cost of a child admission ticket = $25
Cost of [tex]y[/tex] child admission tickets = $25[tex]y[/tex]
Total amount paid by 625 people = $19,000
So,
[tex]40x+25y=19,000[/tex]