Let's suppose you want to build a house.
To do this, you're going to need people to help build the house. Specifically, you're going to need contractors, engineers, and construction workers.
After weeks of work, they finally finish building the house, and now you owe them a total of $\$85000$.
Given the following data:
1- The number of all employees = 100
2- Each engineer's wage equals $0.2$ times that of a contractor, and each worker's wage equals $0.1$ times that of an engineer.
3- Each contractor's wage = $8500.
How many contractors, engineers, and construction workers do you need, and how many dollars will each of them earn if the wages total to $\$85000$ ?