no solution, unique solution, and infinite solutions
When two lines are parallel to each other, the system has no solution and there is no intersection point:
\(y = 2x + 4\) and \(y = 2x + 10\)
When two lines intersect at one point, the intersecting point is the unique solution of the system:
\(y - 2x = 5\) and \(3x - y = 5\)
When two equations of a linear system are essentially the same line (constant multiple of each other), we have infinitely many solutions:
\(-4x+y = 2\) and \(-12x + 3y = 6\)