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3x + 6 = 90
3x = 90 - 6
3x = 84
x = 84 : 3
x = 28
Comprobamos:
x + (x+2) + (x+4) = 90
28 + (28 + 2) + (28 + 4) = 90
28 + 30 + 32 = 90
90 = 90
Los números son: 28, 30 y 32.
Ya que:
x = 28
x + 2 = 28 + 2 = 30
x + 4 = 28 + 4 = 32
28 + 30 + 32 = 90
Además son números pares ya que los números pares terminan en 0,2,4,6,8.