If `x-2y =-1` ,`2x-y = 7` then find the value of `x-y`.

If 2x+y=-2,3x-y=7 then find the value of x.

If 3x+5y=9,5x+3y=7 then find the value of x-y .

If 4x+5y=10,5x+4y=17 then find the value of x+y and x-y .

If 3x -y = 10 and x-3y= -2 find the value of x-y .

For simultaneous equations in variables x and y, if D_x = -14, D_y =7 and D = -35, then find the values of x and y.

If the line x+2b y+7=0 is a diameter of the circle x^2+y^2-6x+2y=0 , then find the value of b

If the line x+2b y+7=0 is a diameter of the circle x^2+y^2-6x+2y=0 , then find the value of b

If 5x+7y=17 , 7x+5y=19 then the value of x-y is ……….