what must be added to 5x - 3y + 2z to get 3x - 4y +7z
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Answer:
-2x -1y - 5z
Step-by-step explanation:
Let the number be (a)
5x - 3y + 2z + (a) = 3x - 4y + 7z
(a) = 3x - 4y + 7z - 5x + 3y - 2z
= -2x - 1y - 5z
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