Answer:
He buy 6 children tickets
Step-by-step explanation:
First we have to perform 2 equations, one indicating the number of tickets and the other the total amount
x = Adult tickets
y = Children tickets
x + y = 15
x * $5 + y * $3 = $57
we clear the x from the first equations
x + y = 15
x = 15 - y
we replace the value of x in the second equation with (15 - y) and solve
x * $5 + y * $3 = $57
(15 - y) * 5 + y * 3 = 57
75 - 5y + 3y = 57
-5y + 3y = 57 - 75
-2y = -18
y = -18/-2
y = 9
we replace y in the first equation
x = 15 - y
x = 15 - 9
x = 6
He buy 6 children tickets
Answer:
The answer is D
Step-by-step explanation:
Ed spent $57 on 9 children's
