Finding the endpoint

Question

if T (6, 2) is an endpoint of segment TR & M (-1, 0) is the midpoint of segment TR, then what are the coordinates of R, the other endpoint

Answer 1

x_m = (x₁ + x₂)/2

-1 = (6 + x₂)/2

-2 = 6 + x₂

-8 = x₂

 

y_m = (y₁ + y₂)/2

0 = (2 + y₂₎/2

0 = 2 + y₂

-2 = y₂

R(-8,-2)