please helpp me!!
(zoom in to see more clear)
please explain your reasoning!!!

Answer:
Neither because reason is incorrect answer of Vicente is wrong and reason of Zwena is wrong.Though her answer is correct her reason is incorrect.
Step-by-step explanation:
expression 9x-2x+4x is done as
9x-2x+4x
9x+4x-2x
13x-2x
11x