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Set up appropriate systems of two linear equations in two

Question: Set up appropriate systems of two linear equations in two unknowns and then solve the systems by determinants. All numbers are accurate to at least two significant digits.

Sterling silver is 92.5% silver and 7.5% copper. One silver-copper alloy is 94.0% silver, and a second silver-copper alloy is 85.0% silver. How much of each should be used in order to make 100 g of sterling silver?

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Mathematics: Set up appropriate systems of two linear equations in two

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Mathematics: Set up appropriate systems of two linear equations in two

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