For what value of k, the equations
2x – 3y + 2z = a,
5x + 4y – 2z = – 3, and
x – 13y + kz = 9
will not have a unique solution?
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For what value of k, the equations
2x – 3y + 2z = a,
5x + 4y – 2z = – 3, and
x – 13y + kz = 9
will not have a unique solution?