If `x : y=3:4\ a n d\ a : b=1:2,` then the value of `(2x a+y b)/(3y b-4x a)` is `5/6` b. `6/7` c. `6/5` d. `7/6`

If x:y=3:4land a:b=1:2, then the value of (2xa+yb)/(3yb-4xa) is (5)/(6) b.(6)/(7) c.(6)/(5) d.(7)/(6)

If 2x+y=5 and 3x-4y=2, then the value of 2xy is (a) 4 (b) 6 (c) 8 (d) 10

If 3x-4y+z=7; 2x-z+3y=19 ; x+2y+2z=24 , then what is the value of z ? (a) 4 (b) 5 (c) 6 (d) 8

Find the value of x 'if : [[2x-y,5],[3,y]]=[[6,5],[3,-2]] a.1 b.2 c.6 d.5

If the equations of the tangent to the circle x^(2)+ y^(2)- 2x + 6y -6 =0 parallel to 3x - 4y + 7=0 is 3x - 4y +k=0 , then the values of k are : a) 5,-35 b) -5,35 c) 7,-32 d) -7,32

If x=a,y=b is the solution of the equations x-y=2 and x+y=4 then the values of a and b are respectively, a)3 and 1 b)-1 and -3 c)6 and 4 d)5 and 3

If 3x-5y=5 and (x)/(x+y)=(5)/(7), then what is the value of 2xy is (a) 3(b)4(c)6(d)9(e) None of these

If 2x+3y=5 and 3x+2y=10 then x-y= (a) 3 (b) 4 (c) 5 (d) 6