Answer:
![18-3x](https://img.qammunity.org/2019/formulas/mathematics/high-school/133x8rxi37yrurqhtn7fwqenavzvvip2xg.png)
Explanation:
Given : Nadeen is at an arcade. She started with 18 tokens. Each game costs 3 tokens.
To Find : Which expressions can we use to describe how many tokens Nadeen has left?
Solution:
Cost of 1 game = 3 tokens
Let x be the number of games played by Nadeen
So, Cost of x games = 3x tokens
We are given that She started with 18 tokens.
So, token left =
![18-3x](https://img.qammunity.org/2019/formulas/mathematics/high-school/133x8rxi37yrurqhtn7fwqenavzvvip2xg.png)
Thus we can use
expressions to describe how many tokens Nadeen has left.