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Working continuously for a total of 120 hours, a machine first assembled $$x$$ units of product A and then assembled $$y$$ units of product B. where $$x$$ and $$y$$ are positive integers. It took the machine 3 hours to assemble each unit of product A and 5 hours to assemble each unit of product B. Which of the following could be the total number of units of product A and product B that the machine assembled in the 120 hours?
Indicate all such numbers.
Indicate all such numbers.
C显示答案
· 相关考点
3.3.2 解二元一次方程组与相关应用题 1.1.2 凑整 1.1.2凑整 考察角度三：个位分析法凑整 7.2.3 GRE数学170脏题
3.3.2 解二元一次方程组与相关应用题
6.4.5 概率中的集合问题
7.2.3 GRE数学170脏题
以上解析由 考满分老师提供。
