If `4x +6y=32` and `4x-2y =4`, then, 8y is equal to
28
30
36
42

8.If 3x+4y:x+2y=9:4 ,then 3x+5y:3x-y is equal to

If P=3x-4y-8z, Q=-10y+7x+11z and R=19z-6y+4x , then P-Q+R is equal to

If |(x,y),(4,2)|=7 and |(2,3),(y,x)|=4 , then

2 x + 3y = 4, 4x + 6y = 12 .

Solve for x and y : 3x-2y=4 and 6x-4y=8

Let matrix A=[(x,3,2),(1,y,4),(2, 2,z)], " if " xyz=2lambda and 8x+4y+3x=lambda+28 , then (adj A) A equals :

2x+3y=8 4x-5y=-6

If the circle x^2+y^2+4x+22y+l=0 bisects the circumference of the circle x^2+y^2-2x+8y-m=0 , then l+m is equal to