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ZX-CCECC1DA962024年10月北美B卷 · 第 3 题
2024年10月北美B卷 · 原库模块 2 · Q3 原库参考解析
A chemist mixed x liters of a 4% saline solution with y liters of a 7% saline solution to produce a 6% saline solution. Which equation hest represents this situation? (Assume the volumes of the solutions are additive.)
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