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El perimetro(p) = A la suma de las longitudes de los lados
18 = 4x + 3x + 2x + x - 2
18 = 10x - 2
18 + 2 = 10x
20 = 10x
20/10 = x
2 = x
Lado = 4x = 4 * 2= 8cm
Lado = 3x = 3 * 2 = 6cm
Lado = 2x = 2 * 2 = 4cm
Lado = x - 2 = 2 - 0 = 0cm
El problema esta mal planteado ya que un lado da 0cm