1st Solving the problem using only a single variable.

 Over the next few posts, I will show you many ways to solve the same word problem.  In this video, I will show you how to solve the problem using only a single variable.

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.

For this problem we are going to use x for the number of students and 100-x for the number of adults.

Watch the video to make sure you understand how to do the problem.