Answer:
money you need to save per week ≥ price / number of weeks
Explanation:
You have to determine the minimum amount of money you need to save each week. This amount of money multiplied by the number of weeks you spend saving must be greater or equal to the price of the item. That is:
number of weeks * money you need to save per week ≥ price
Isolating money saved:
money you need to save per week ≥ price / number of weeks