Respuestas

  • Usuario de Brainly
2013-10-02T21:08:42+02:00
Mira: A-B= C
 A + B + C = 1200
 B = A / 4

C = A - B   -> C = A - A / 4

A + A/4 + A - A/4 = 1200
2A = 1200
A = 600
B = 150
C = 450   Luego 4 + 5 + 0 = 9