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Homework Statement
Frank bought supplies for school. In the first store, he spent half his money plus $10. In the second store, he spent half of what he had left plus $10. In the third store, he spent 80% of what he had left. He came home with $5. How much did Frank start out with?
Homework Equations
The Attempt at a Solution
Any help would be appreciated.
Let x represent the original cost: