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  • Usuário do Brainly
2014-08-14T11:25:41-03:00
7 = a+2b/2
~~a+2b=14

a+2c / 2 = 8
~~a+2c=16

M= a + b + c / 3

a=a
14-2b = 16-2c
2c-2b = 2
c-b=1
b=c-1

M= a + b + c / 3
M=a+2c-1/3
M = 16-1/3
M = 15/3
M = 5

OBS : a+2c = 16
2 5 2