the complete question in the attached figure
Let
(a,b)--------> the coordinates of the point R
we know that
midpoint RS is
coordinate x
8=(9+a)/2-------> 16=9+a------> a=16-9------> a=7
coordinate y
7=(5+b)/2------> 14=5+b--------> b=14-5-----> b=9
the point R is (7,9)
the answer is
the coordinates of point R are (7,9)
see the attached figure
