Equation of line parallel to the line Ax + By + C = 0 is:
x + y = - C
x + y + k = 0.
Bx + Ay = C
Ax + By + k = 0
Equation of line parallel to the line Ax + By + C = 0 is Ax + By + k = 0.
The equation of the straight line passing through the origin and the middle point of the portion of the line ax + by + c = 0 between the axes, is