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x=5y
x+y=42
sustituimos x=5y,en la segunda ecuacion
x+y=42
5y+y=42
6y=42
y=42/6
y=7
si y=5
x+y=42
x+7=42
x=42-7
x=35
x=35 y=7
hay 35 hombres
hay 7 mujeres
Numero de hombres = 5x
5x +x = 42
6x = 42
x = 42/6
x = 7
Numero de mujeres = 7
Numero de hombres = 5x = 5*7 = 35
Hay 35 hombres, 7 mujeres.