Most likely not getting all the answers on Q and A sites... *cough cough*
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extraneous solution. or the lines do not intersect. There is no common point (solution) for the system of equation.
It is a system in which the solution set is a straight line.
the solution to a system is where the two lines intersect upon a graph.
there is no linear equations that has no solution every problem has a solution
Independent system.