endpoint (-12, -7), midpoint (-5, -13) what’s the other endpoint

Question

i need to know the other endpoint if the equation.

Answer 1

x_m = (x₁ + x₂)/2         y_m = (y₁ + y₂)/2

-5 = (-12 + x₂)/2       -13 = (-7 + y₂)/2        Multiply both equations by 2.

-10 = -12 + x₂            -26 = -7 + y₂

2 = x₂                          -19 = y₂

P(2, -19)