Gus has lunch money of $140 per month. he spends. $6 per day on lunch. which of the following equations represents how much money is left in his lunch budget after x days of buying lunch?

The equation that represents how much money is left in Gus's lunch budget after x days of buying lunch is:

Money_left = Lunch_money_per_month - (Lunch_cost_per_day * x)

In this case,
Lunch_money_per_month = $140
Lunch_cost_per_day = $6

So, the equation will be:
Money_left = $140 - ($6 * x)