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Problema de ecuaciones de segundo grado de EDADES
 
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josehp88



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MensajePublicado: Sab Abr 21, 2012 3:48 pm    Título del mensaje: Problema de ecuaciones de segundo grado de EDADES Responder citando

La edad de una madre es el doble de la de su hijo, y hace diez años era el triple. ¿Qué edad tiene cada uno?
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cv



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MensajePublicado: Dom Abr 22, 2012 1:28 am    Título del mensaje: Re: Problema de ecuaciones de segundo grado de EDADES Responder citando

josehp88 escribió:
La edad de una madre es el doble de la de su hijo, y hace diez años era el triple. ¿Qué edad tiene cada uno?


Hola, si M y H son las edades de la madre e hijo hoy la ecuacion es

M=2H

y hace 10 años

M-10 = 3(H-10)

si sustituyes M de la primera en esta ecuacion tendras H luego duplicas el valor que te da y tienes M.

Un saludo.

Recuerda que son ecuaciones de primer grado con 2 incognitas.
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