The augmented matrix is given for a system of equations. If the system is consistent, find the general solution. Otherwise state that there is no solution. 
A. x1 = -20 + 11x3
x2 = 7 - 4x3
x3 is free
B. x1 = -20 + 11x3
x2 = 7 - 4x3
x3 = 2
C. No solution
D. x1 = -6 - 2x2 + 3x3
x2 is free
x3 is free
Answer: C
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