Ononot — A tank contains 50 L of pure water. Salt solution with 2 g/L

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Differential Equationsmedium

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A tank contains $50$ L of pure water. Salt solution with $2$ g/L enters at $3$ L/min. The mixture drains at $3$ L/min. Let $S(t)$ be the amount of salt in grams. Which differential equation represents this process?