Solve the system.
A) (1, 2, 1)
B) (3, 2, 1)
C) (3, -2, 1)
D) The system is inconsistent
E) The system is dependent

Question

Solve the system. 
A) (1, 2, 1) 
B) (3, 2, 1) 
C) (3, -2, 1) 
D) The system is inconsistent 
E) The system is dependent

Quizplus · Accepted Answer

By adding the first two equations and subtracting the third equation, we get x=3. Substituting x=3 into the second equation, we get y=2. Finally, substituting x=3 and y=2 into the first equation, we get z=1. Therefore, the solution is (3, 2, 1), which corresponds to choice B.

Solve the System