Answer:

Explanation:
First, we will denote the number of hours Ally took for private lessons as
.
The total cost Ally spent on gear rental and private lessons is $157.50. The gear rental fee is $57.50, and the cost of private lessons is $20 per hour. Therefore, the equation representing the total cost can be written as:

Please make sure to include the "$" symbol as I'm unable to when creating an equation.
We only put $57.50 once because it is not an hourly rate or something that is recurring. The rental fee for the ski gear is a one time payment.
On the other hand. 20x represents $20 per hour for lessons so we do make it recurring by including x.
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