It seems the problem content and the student's solution are missing from your message. To help you correct the student's mistake, could you please provide the specific problem and the student's attempted solution? Once you share those details, I'll be able to identify the error, explain it clearly, and give the correct solution.

If you had a problem like (for example):
Problem: Solve 2x + 5 = 15
Student's solution: 2x = 15 +5 → 2x=20 → x=10

Then the mistake would be adding 5 instead of subtracting it from both sides. But since I don't have your actual problem and solution, please share them so I can assist properly!

Let me know the details, and I'll help you out.

作者声明:本文包含人工智能生成内容。