Equation of a line passing through the intersection of the lines 7x – y + 2 = 0 and x – 3y + 6 = 0 parallel to x-axis is

Equation of any line through the intersection of given line is 7x−y+2+λ(x−3y+6)=0It will be parallel to x-axis if 7+λ=0⇒λ=−7and the required equation is y = 2 .