← 一元一次方程与代数求值进阶

ONE QUESTION, ONE STEP

ZX-A7E1F1C29C

2025年8月国际B卷(易) · 第 1 题

2025年8月国际B卷(易) · 原库模块 1 · Q1 原库参考解析

The equation  \( x+y=1,440 \) represents the number of minutes of daylight (between sunrise and sunset),  x, and the number of minutes of non-daylight, y, on a particular day in Des Moines, Iowa. If this day has 840 minutes of daylight, how many minutes of non-daylight does it have?
选择答案