A store purchased x packages of AAA batteries at $5 per package and y packages of AA batteries at $7 per package for a total cost of $135. If at least one package of each type of battery was purchased, what are the possibilities of the number of packages of AAA batteries and the number of packages of AA batteries?

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Payback Period

Payback period analysis is a method used to determine the relative time value of a project. It measures the time that a project will take to return its initial investment. The total time taken by the project to return the initial investment made for the project is called the payback period.