Question 426581
  <pre><font face = "Tohoma" size = 4 color = "indigo"><b>
Hi
point m with coordinates (5,4) is the midpoint of AB.  Pt B(7,3)
Midpoint Pt(x,y):  ( {{{(x[1] + x[2])/2}}}, {{{(y[1] + y[2])/2  )}}})
 (7+ x)/2 = 5 
     x = 3
 (3 + y)/2 = 4
     y = 5 
 Pt A(3,5)
CHECKING our Answer***  (3+7)/2 = 5   and (5+3)/2=4
{{{drawing(300,300,   -10,10,-10,10,  grid(1),
circle(7, 3,0.4),
circle(3, 5,0.4),
line(7,3,3,5),
circle(5,4,0.3),
graph( 300, 300, -10,10,-10,10))}}}