[2(x-y)=3],[5x+8y=14]

Find the value of (x-y), if 2x-5y=5,5x-8y=14

2x-3y=14,5x+2y=16

5x-3y=8,3x+y=2 .

Prove that: |[x+y,x,x],[5x+4y,4x,2x],[10x+8y,8x,3x]|=x^3 .

Find the value of (x+y),if 5x-2y=10,x+8y=26

Classify the following pairs of lines as coincident, parallel, perpendicular or intersecting : (i) 6x+14y-16=0 , 12x+28y-32=0 (ii) 3x-4y=8 , 3x+4y=11 (iii) 5x-2y=7 , 2y-5x=-7 (iv) 4x+7y=19 , 7x-4y=-2 (v) x-2y=7 , 4y-2x=13

Orthocentre of the triangle formed by lines 2x+3y-5=0 ,5x+8y+3=0,6x-4y-2=0 is :

Find the value of 27 x^3+\ 8y^3, if (i) 3x+2y=14 and x y=8 (ii) 3x+2y=20\ and x y=(14)/9