Question

Solve the following using elimination, substitution, or graphing. Tickets for The Phantom of the Opera cost $6 for children and $12 for adults. A local school group paid $252 for 36 tickets. How many of each did they purchase?

Answer 1

Answer: 30 Child tickets 6 Adult tickets.

Explanation:

Set up your system of equations to solve.

36 tickets are purchased, meaning a number of child tickets, and a different number of adult tickets add up to 36. We can write this as x+y=36.

The price of the tickets add up to 252 dollars. We can write this as 6 (the child price) times x + 12 (the adult price) times y = 252

So, x+y=36 and 6x+12y=252.

I will solve this using the substitution method.

So, first, we need to isolate a variable, I will choose the first equation to do so.

x+y=36 ---> x=36-y

Now, plug the value of x into the second equation.

6(36-y)+12y=252.

Distribute.

216-6y+12y=252

Combine like terms.

216+6y=252.

Subtract 216 from both sides.

6y=36

Divide by 6 on both sides.

y=6

Now plug this value of y into the previous equation to get x.

x+6=36

Subtract 6 from both sides.

x=30

Remember x was children's tickets and y was adult tickets. (It is better to use variables like C and A in this case).