a,b,c are real constants such that all the lines represented by ax+by+c=0 are concurrent at a point P. This point P lies on the line ax+by+c=0 such that 7a+2b+8c=0. What are the coordinates of P?
Not sure about this.....but....
This must imply that
(7/8) a + (2/8)b + c = 0
a(7/8) + b (2/8) + c = 0
(x , y) = (7/8 , 2/8) = (7/8, 1/4) = P