If `3x+2y=10` and `2x+3y=15`, find the value of `x+y`.

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

If 3x-7y=10\ and x y=-1, find the value of 9x^2+49 y^2

If 3x-2y=24 and 2x-3y=18, then find the value of x+y.

(i) x+2y=-7 and 3x-2y=-1, then find the value of x. (ii) If x+y=8 and 4y-x=2, then find the value of y. (iii) If 3x+5y=9 and 5x+3y=7, then find the value of x+y. (iv) If 3x-y=11 and x-3y=17, then find the value of x-y.

If 3x-2y=11 and x y=12 , find the value of 27\ x^3-8y^3

If 2x+3y=13 and x y=6, find the value of 8x^3+27 y^3

3x+y=19 and x+3y=1 then find the value of 2x+2y

If 2x- 3y= 10 and xy= 16 , find the value of 8x^(3)- 27y^(3)

If 2x+3y=13 and x y=6 , find the value of 8x^3+27 y^3