Provide an appropriate response.If 
, then
A. x1 = -1 + x3 - x4, x2 = 4 + 2x3 + x4, x3 = x3, x4 = x4
B. x1 = 2 + x3, x2 = -1 - 2x3 - 4x4, x3 = x3, x4 = x4
C. x1 = 3 - 6x4, x2 = 4 + x4, x3 = -2 + 3x4, x4 = x4
D. x1 = 3 - 6x4, x2 = 4 - x4, x3 = -2 + 3x4, x4 = x4
E. x1 = -1 + x4, x2 = 3x4, x3 = 6 + 2x4, x4 = x4
Answer: B
Mathematics
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A. 
B. 
C. 
D. 
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