Substituting the values of a, b and c in (1), we get the required equation of the
plane as 
1
2
3
4
x
y
z
+
+
=  or 6x + 4y + 3z = 12 11 6 5  Plane passing through the intersection
of two given planes
Let  π1 and π 2 be two planes with equat ions
rr n⋅1ˆ
 = d1 and 
rr n⋅2ˆ
 = d2 respectively