A scientist needs to make 2 liters of saline solution (salt water), in which the salt level must be at 15% concentration (meaning 15% of the water is salt).
Unfortunately, the scientist only has two types of saline solution in his
possession. He has saline solution with a 10% concentration level and saline
solution with a 35% concentration level.
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How much of each type of saline solution should the scientist mix together to
achieve 2 liters of saline solution at a concentration level of 15%?
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Let I represent the amount 10% saline solution and let y represent the amount
of 35% saline solution.
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