ONE QUESTION, ONE STEP
ZX-CAFE30B3BB2024年11月A卷 · 第 22 题
2024年11月A卷 · 原库模块 1 · Q22 原库参考解析
A machine makes 8-inch, 9-inch, and 3-inch parts. During a certain day, the number of 8-inch parts that the machine makes is 4 times the number n of 9-inch parts, and the number of 3-inch parts is 30. During this day, the machine makes 100 parts total. Which equation represents this situation?
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