Prove that the straight lines 4x+7y=9, 5x-8y+15=0 and 9x-y+6=0 are concurrent.

For what value of 'a' the three straight lines 3x+y+2=0, x-y+2=0, x+2ay+5=0 are concurrent.

If a ,\ b ,\ c are in A.P. prove that the straight lines a x+2y+1=0,\ b x+3y+1=0\ a n d\ c x+4y+1=0 are concurrent.

Show that the lines 2x + 5y = 1, x - 3y = 6 and x + 5y + 2 = 0 are concurrent.

Prove that the lies 3x+y-14=0,\ x-2y=0\ n a d\ 3x-8y+4=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 pair of straight lines xy - x - y +1=0 & the line ax+2y-3=0 are concurrent then a =

Prove that the three lines 2x-y-5=0, 3x-y-6=0 and 4x-y-7=0 meet in a point.

The straight lines x+2y-9=0,3x+5y-5=0 , and a x+b y-1=0 are concurrent, if the straight line 35 x-22 y+1=0 passes through the point (a). (a , b) (b) (b ,a) (-a ,-b) (d) none of these

Show that the line x-y-6=0,4x-3y-20=0 and 6x+5y+8=0 are concurrent. Also, find their common point of intersection.

Three straight lines 2x+11y-5=0, 24x+7y-20=0 and 4x-3y-2=0