Question 196519
1) The two lines intersect.  In this case, there is one solution to the systme of equations and it is the point of intersection of the two lines.
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2)  The two lines are parallel.  In this case, the lines do not intersect and there is no solution to the system of equations.
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3) The two lines are coincident (one line is directly on top of the other line).  In this case there is an infinite number of solutions.