2026年3月国际A卷 · 第 21 题

2026年3月国际A卷 · 原库模块 2 · Q21 原库参考解析

In the figure shown, d, e, and f are constants and the value of k is 2. If the measure of angles D, E, and F are 42°, x°, and (2x + 12)°, respectively, what is the measure, in degrees, of angle S?