Find the coordinates of the other endpoint of the​ segment

Question

Find the coordinates of the other endpoint of the​ segment, given its midpoint and one endpoint.​ (Hint: Let​ (x,y) be the unknown endpoint. Apply the midpoint​ formula, and solve the two equations for x and​ y.)

midpoint

​(3​,11​),

endpoint

​(8,5​)

Answer 1

midpoint formula is. (x1 + x2)/2. and. (y1 + y2)/2

Applying this formula for the x's, 3 = (x1 + 8)/2 ----> 6 = x1 + 8 --->. x1 = -2

Do the same sort of thing with the y's