Find the coordinates of A if M(-1,2) is the midpoint of AB and B has coordinates of (3,-5)

Question

How am I to find the endpoint for this 

 

Answer 1

 

  (X+3)/2 = -1  --->  x+3 = -2  ----> x = -5

 

  (Y+ -5)/2 = 2 ----> Y + -5 = 4 ----> Y = 9

 

 

(-5,9)