2026年5月国际B卷(易) · 第 9 题

2026年5月国际B卷(易) · 原库模块 1 · Q9 原库参考解析

A botanist studied the growth rate of a birch tree over two years. In the first year, the height of the tree increased c inches. In the second year, the height of the tree increased d inches. The height of the tree increased a total of 48 inches over these two years. Which equation represents this situation?

2026年5月国际B卷(易) · 第 9 题

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