一盘曲奇饼排成 3 行。每一行都比它前面的一行多 $p$ 块曲奇饼。最后一行有 $5p$ 块曲奇饼。第一行有多少块曲奇饼？用关于 $p$ 的最简形式表示你的答案。

它不会直接告诉你答案，而是问你卡在哪一步看看 AI 是怎么陪你一步步弄懂这道题的

完整解法

1. Determine the number of cookies in the second row

The last row (3rd row) has $5p$ cookies. Since each row has $p$ more cookies than the row in front of it, the 2nd row has $5p - p = 4p$ cookies.

2. Determine the number of cookies in the front row

The front row (1st row) has $p$ fewer cookies than the 2nd row. So, the front row has $4p - p = 3p$ cookies.

答案

$3p$

AI 分析，可能出错

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