Respuestas

2013-11-09T00:44:35+01:00
A+b+c = 72
b = 1/5c     ----------->     c = 5b
c + 6 + b + 5b = 72
c+ 6b = 66
5b + 6b = 66
11b = 66
b = 6

Rpta:
b = 6
c = 30
a = 36