Question

solving systems of Equations by Elimination method:
Tickets for a movie cost $5 for adults and $2 for students. One afternoon 21 tickets were sold and the receipts totled $72. How many of each type of ticket was sold?
a) write a system of equations.
b) solve by using the elimination method.
HELP!!!!!!

Answer 1

Wanna learn how to do this?

Answer 2

x + y = 21
5x + 2y = 72

Answer 3

yes!!!!

Answer 4

Let's suppose the:
Adult tickets = x
Child ticket = y

To find the total tickets sold we will add them.
(same as when u have to find the total of something, u add them)
So here too we will add them,

x + y = Total tickets,
therefore,
x + y = 21.

Answer 5

okay got that so far.

Answer 6

Now for the second equation,
(let's say one pastry costs about $5. And u want 8 of them, so it means you will write as,
(#of pastries * cost of one pastry)
5(8) for the total amount).

So here we have total amount for tickets sold.
We will write as,
(# of adult tickets *cost of one ticket) + (#of child tickets * cost of one ticket) = Total cost.

Answer 7

So we have,

5x + 2y = 72

Answer 8

Finally two equations,
x + y = 21
5x + 2y = 72

Answer 9

okay i got the system of equation, but how do you solve it by using the elimination method can you tech me that?

Answer 10

http://www.youtube.com/watch?v=hJOqGkWElNs

Answer 11

http://www.youtube.com/watch?v=Y6JsEja15Vk

Answer 12

I am sure those will help!

Answer 13

thanks

Answer 14

Welcome.