" If "5x+2y=14" and "2x+5y=7" ,then find "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 7x+5y=-17 and 5x+7y=-19, then find the value of (i) x-y (ii) x+y.

If x+ y= (7)/(2) and xy= (5)/(2) , find x-y

If 2x+3y=34 and (x+y)/(y)=(13)/(8), then find the value of 5y+7x

If (2x+y,7)=(5,y-3) then find x and y

If (2x+y,7)=(5,y-3) then find x and y

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 (5x+7y):(3x+11y)=2:3 , then find x:y.