Write the system of linear equations represented by the augmented matrix. Then use back-substitution to solve. (Use variables x, y, and z.)
A. x = 4, y = 2, z = -3
B. x = 3, y = -4, z = 2
C. x = 3, y = 4, z = -2
D. x = -18, y = -1, z = 4
E. x = -4, y = 3, z = 2
Answer: B
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A. 37
%.
B. 5%.
C. 
%
D. 
%.
E. none of these
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