3rd Solving the problem using elimination

 I am showing you many ways to solve the same word problem.  In this post we will use elimination to solve it.

Here is the word problem:

You and some friends are going to the movies.  They charge $9 for adults and $7 for children.  The movie theatre had 100 customers and made $790 that night.  How many of each type of ticket did they sell?

First, when working on a word problem you should ALWAYS do a setup. In this setup you explain what the variables that you are using stand for.

We will use x for the number of students and y for the number of adults.

Please watch the video to see how to do it.

NOTE:  You will notice I made a couple mistakes.  I left those mistakes in for a couple reasons.

• To show you that everyone makes mistakes, so don't worry about it if you make a mistake.
• To emphasize the importance of being able to ask yourself "does my answer make sense" and then make the decision.