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Tony submitted his quiz on combining like terms and re-
ceived a failing grade. Examine the work he submitted for
the following problem.
3x +9y+2z-4x+y
3x + 4x +9y-y + 2z
7x+9+2z
Answer the following questions:
1. If the problem Tony submitted is worth 5 points, what score
would you give him and why?
2. Fix Tony's work. Be sure to show all the steps you took to
get your final answer.
Answer using complete sentences.