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hi, can you please explain mistake made on one side the other side the correct work with the answer thanks

hi, can you please explain mistake made on one side the other side the correct work-example-1
User Woot
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1 Answer

2 votes

Notice that:


3x-3x\\e x,

therefore the mistake is the last step.

Now, all the work of the student is correct up to:


undefined

User Usselite
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