Question 1138046
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Add the second and the {{{highlight(cross(first))}}} <U>third</U> equations.


You will get an equation identical to the first one.


It means that the determinant of the coefficient matrix is equal to 0 (zero, ZERO).


In this case the Cramer's Rule (method) does not work and is not applicable.


The coefficient matrix is degenerated and the system has INFINITELY MANY solutions.
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