← 线性建模・建立方程 · 题库进阶

ONE QUESTION, ONE STEP

ZX-47E3E77FF8

2026年3月国际C卷 · 第 4 题

2026年3月国际C卷 · 原库模块 1 · Q4 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 best represents this situation? (Assume the volumes of the solutions are additive.)
选择答案