Hey every one! I have a question I am not able to answer and no one seems to understand it? Could I have some help?!?!?!

Question

anonymous · Answer

A student solved the following problem and made an error:

anonymous · Answer

attachment

anonymous · Answer

In which line did the student make the first mistake?

Line 2

Line 5

Line 3

Line 4

saifoo.khan · Answer

What does the question say?

anonymous · Answer

All the question ask is In which line did the student make the first mistake? That is why it is hard for me to understand i feel like there is not enough information

saifoo.khan · Answer

Line 2. 
It's obvious because there's no other algebraic mistake.

anonymous · Answer

Oh well thank you! I could not understand this question at all!

anonymous · Answer

It was not line 2 i got the question wrong. But oh well it is fine. What would it be then?

saifoo.khan · Answer

NO idea.

anonymous · Answer

Well thank you for trying to help me i appreciate it (:

saifoo.khan · Answer

You're welcome.