A high-end real estate developer needs to install 50 new washing machines in a building she leases to tenants (with utilities included in the monthly rent). She knows that energy-efficient front loaders cost less per year to run, but they can be much more expensive than traditional top loaders. Investigate by visiting an appliance store or using the Internet, the prices and energy efficiency of two comparable front-loading and top-loading washing machines.
Estimate how many years it will take for the total expenditure (including purchase and cost of use) for the 50 front-loading machines to equal the total expenditure for the 50 top-loading machines.
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