Point of Intersection of two Lines Calculator



An online calculator to find the point(s) of intersection of two lines given by the equations :
$ a x + b y = c $ and $ d x + e y = f $

How to use the calculator

1 - Enter parameters a, b and c, of the equation of the first line and parameters d, e and f of the second line.

This calculator solves the system of equations, represented by the two lines.

2 - press "enter". The answer is a point whose coordinates are x and y.

Note that

1 - if you enter parameters a, b, c, d, e and f such that D = a*e - b*d is not equal to zero, one point of intersection exists and is calculated and displayed.

2 - if you enter parameters a, b, c, d, e and f such that D = a*e - b*d = 0, two possible cases:

case 1) If either Dx = c*e - b*d is not equal to zero or Dy = c*e - b*d is not equal to zero, no intersection exists. The message "no solutions" is dispalyed.

case 2) If both Dx = c*e - b*f = 0 and Dy = a*f - c*d = 0, the two lines are equivalent and have an infinite number of points of intersection given by the graph of one of the two equations.

$a x + b y = c$
$ x$ + $y$ =

$d x + e y = f$
$x$ + $y$ =

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Updated: February 2015

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