Question

Se (2,3) e ponto de médio de AB com A(n,5) e B(4,m)quanto vale m+n

Answer 1

(n-4)/2 , (5-m)/2 = (2,3)
(n-4)/2 = 2 --> n-4 = 4 --> n = 0
(5-m)/2 = 3 --> 5-m = 6 --> m = 5-6 --> m = -1
M = (0;-1)