If the pair of straight lines `xy - x - y +1=0` & the line `ax+2y-3=0` are concurrent then `a =`

If the straight lines 3x+4y+2=0,2x-y+3=0 and 2x+ay-6=0 are concurrent,then a=

Show that the straight lines : x-y-1=0 , 4x+3y=25 and 2x-3y+1=0 are concurrent.

The lines 2x + y -1=0 , ax+ 3y-3=0 and 3x + 2y -2=0 are concurrent for -

Find the value of P ,if the straight lines x+P=0,y+2=0 and 3x+2y+5=0 are concurrent.

If the straight lines x+2y=9,3x-5y=5 and ax+by=1 are concurrent , then the straight line 5x+2y=1 passes through the point

If the lines x-y-1=0, 4x+3y=k and 2x-3y+1=0 are concurrent, then k is

If the pair of straight lines ax^(2)-2pxy-y^(2)=0and x^(2)-2qxy-y^(2)=0 are such that each pair bisects the angle between the other pair , then prove that pq=-1 .

If the lines x - y + 1 = 0, 2x + 3y + 2 = 0 and ax + by - 2 = 0 are concurrent, then 5x + 10 = 0 passes through the point