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Add $( 4 x - 6 y - z ) + ( 7 x - 4 y - 2 z ) + ( - 5 x - 9 y - 4 z )$

Question 32

Multiple Choice

Add. $( 4 x - 6 y - z ) + ( 7 x - 4 y - 2 z ) + ( - 5 x - 9 y - 4 z )$

A) 6x + 21y - 9z
B) 16x - 21y + 7z
C) 6x - 19y - 7z
D) 6x - 19y - 6z
E) 16x + 19y - 7z

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