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Question:
Which of the following equals (x + y + z) – (-2x +2y + z)?
A
3x – y
explanation
Distribute the negative sign. Then identify, group, and combine like terms:
(x + y + z) − (−2x + 2y + z)
= x + y + z + 2x − 2y − z
= x + 2x + y − 2y + z − z
= 3x − y
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