4x+y, -9x+3y , 4x-4y
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Answer:
-x
Step-by-step explanation:
- 4x + y - 9x + 3y + 4x - 4y
- 4x - 9x + 4x + y + 3y - 4y
- 8x - 9x + 4y - 4y
- -x
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