Question 79

Consider the following system of equations in three real variables $$x_1, x_2$$ and $$x_3$$
$$2x_1 - x_2 + 3x_3 = 1$$
$$3x_1 - 2x_2 + 5x_3 = 2$$
$$-x_1 - 4x_2 + x_3 = 3$$
The system of equations has :


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