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Which plane is parallel to 2x - 3y + z = 5?

A2x + 3y + z = 5
B4x - 6y + 2z = 7
Cx - 3y + 2z = 5
D2x - 3y - z = 5
Answer & Solution
Correct answer: B. 4x - 6y + 2z = 7
Its normal (4,-6,2) is twice (2,-3,1), so the two planes have the same orientation.
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