To solve this problem you must apply the proccedure shown below:
1. Let's call the games won
and the games lost
.
2. Then, based on the information give in the problem, you can make the following system of equations:

3. You can use the Substitution method. You must substitute
into the second equation and solve for
:


3. Now substitute this values obtained into the first equation and solve for
:


The answer is: The team won 40 games and lost 42 games.