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10 votes
10 votes
(-x-y+2z = −21

(5x-3y - 2z=-23
If the equations above are true, which of the following is a value of X-Y?
A:5
B:16
C:-11
D:0
E:21

User Pyronaur
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1 Answer

18 votes
18 votes

Answer: E

Explanation:

User Vishal Pawar
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