Thirty six games were played in a football tournament with each team playing once against each other. How many teams were there?

Explanation

To solve the problem of how many teams were there in a football tournament where 36 games were played, we can follow these steps:

### Step 1: Understand the Problem
We know that each team plays against every other team exactly once. If there are \( x \) teams, the number of games played can be calculated using the combination formula for choosing 2 teams from \( x \), which is denoted as \( C(x, 2) \).

### Step 2: Set Up the Equation
The formula for combinations is given by:

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