ONE QUESTION, ONE STEP
ZX-2F3E42BF352024年11月北美A卷 · 第 14 题
2024年11月北美A卷 · 原库模块 1 · Q14 原库参考解析
A landscaping company mixes oil with gasoline to power its tools. A chainsaw requires 8 ounces of oil per gallon of gasoline. A lawnmower requires 4 ounces of oil per gallon of gasoline. The company uses a total of 21 ounces of oil in its mixes for the chainsaw and lawnmower. Which of the following equations represents this situation, where x represents the amount of gasoline, in gallons, in the mix for the chainsaw and y represents the amount of gasoline, in gallons, in the mix for the lawnmower?
参考答案：
解题思路
容易忽略的一步
