Resposta :

jhonatastv
x/2 + x + 3x = 90

m.m.c (2)

x + 2x + 6x = 180
  2                  2

9x = 180
x = 180/9
x = 20
luizinetefernan
x/2 + x + 3x = 90    MM c = 2
x  + 2x + 6x = 180
9x = 180
  x= 180/9
  x = 20

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