Find the sum of (4x + 8xy - 2y) and (6yx + 6y + 9x + 7).
Find equation of the line which is equidistant from parallel lines 9x+6y−7=0 and 3x+2y+6=0
Find the equation of the line mid - way between the parallel lines 9x+6y−7=0 and 3x+2y+6=0.