Respuesta :

Answer:

(13,-5)

Step-by-step explanation:

let the coordinates of S be (x,y)

so, we have

(9,1) = (5+x/2, 7+y/2)

so, 9 = (5 + x) /2      1 = (7+ y)/2

9*2 = 5 + x                2= 7 + y

18 -5 =x                     2-7 = y

13 =x                           -5 = y