Do the equations 4x+3y-1=5 and 12x+9y=15 represent a pair of coincident lines. Justify your answer. Do the equations 4x+3y-1=5 and 12x+9y=15 represent a pair of coincident lines. Justify your answer. November 22, 2020 Category: Chapter 3 - Pair of Linear Equations in Two Variables , Maths , NCERT Class 10 ,