3x-y=7:x+4y=11

3x-y=7; 2x+4y=0

Solve the following system of equations by matrix method : 5x+7y+2=0 4x+6y+3=0 5x+2y=3 3x+2y=5 3x+4y-5=0 x-y+3=0 3x+y=19 3x-y=23 3x+7y=4 x+2y=-1 3x+y=7 5x+3y=12

Find the values of (x-y) , if (i) 3x + 4y = 11 , 4x + 3y = 10 (ii) 3x + 2y = 8 , 2x + 3y = 7

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

Solve the following simultaneous equations using Carmer's rule: (i)3x+y=7 , 2x-11y=3 . (ii) x+2y=-4 , 3x+4y=-6 .

Solve x + y = 7 and 3x - 2y = 11.

Solve x + y = 7 and 3x - 2y = 11.

The area of the parallelogram formed by the lines 3x+4y=7a;3x+4y=7b;4x+3y-7c and 4x+3y=7d is-