the ticket of 2 adult and 1 child is 3900. 3 adult and 2 children is 6300. find the fair and seat cost About the author Delilah

Step-by-step explanation: x- cost for an adult y- cost for a child 2x + y = 3900 3x + 2y = 6300 Multiply 1st equation by 2 4x + 2y = 7800 ( – ) 3x + 2y = 6300 ———————– x + 0y = 1500 ———————— x = 1500 2x + y = 3900 y = 3900 – 2x sub x=1500 y = 3900 – 2 (1500) y = 3900 – 3000 y = 900 cost for an adult = 1500 coat for a child = 900 Reply

Step-by-step explanation:x- cost for an adult

y- cost for a child

2x + y = 3900

3x + 2y = 6300

Multiply 1st equation by 2

4x + 2y = 7800

( – )

3x + 2y = 6300

———————–

x + 0y = 1500

————————

x = 1500

2x + y = 3900

y = 3900 – 2x

sub x=1500

y = 3900 – 2 (1500)

y = 3900 – 3000

y = 900

cost for an adult = 1500

coat for a child = 900