If `2x+y=5` and `3x-4y=2` , then the value of `2x y` 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

If 8x + 5y = 9, 3x + 2y = 4, then the value of x and y are

If x-y=1 and x^(2)+y^(2)=41, then the value of x+y will be (a)5 or 4(b)-5 or -4 (c) +-9(d)+-1

If x^(4)+y^(4)=17 and x+y=1, then what is the value of x^(2)y^(2)-2xy?( a) 8 (b) 10(c)12 (d) 16

If 2x +3y = 30 and (x+y)/y = 11/8 , then find the value of 5y + 6x

If parabolas y^(2)=lambda x and 25[(x-3)^(2)+(y+2)^(2)]=(3x-4y-2)^(2) are equal,then the value of lambda is 9(b)3(c)7 (d) 6

Find the value of x:y, if (8x-10y)/(3x+4y) = (4)/(5) .

If x=5 and y=-2 , then find the value of (i) (8x-2y+5)/(2x+4ty+12) " "(ii) (5x-6y-7)/(3x+6y+12)

If [2x+y4x5x-74x]=[77y-13yx+6] then the value of x+y is x=3,y=1 (b) x=2,y=3(c)x=2,y=4(d)x=3y=3