Respuestas

2013-04-19T04:53:57+02:00

|6 a 7   |   |x|      |8  |

|7 6 10 |   |y| =  |6  |

|2 3 7   |   |z|      |10|

 

         |8 a 7   |

         |6 6 10 |

         |10 3 7 |

x =  --------------- = 8(42-30)-a(42-100)+7(18-60)=-198+58a=  -99+29a

         |6 a 7   |        ---------------------------------------------------------  -----------

         |7 6 10 |        6(42-30)-a(49-20)+7(21-12)=                        135-29a

         |2 3 7   |

 

 

         |6 8 7   |

         |7 6 10 |

         |2 10 7 |

y =  ---------------= 6(42-100)+8(49-20)-7(70-12)=    -522

         |6 a 7   |                                                               -----------

         |7 6 10 |                                                               135-29a

         |2 3 7   |

 

 

         |6 a 8   |

         |7 6 6 |

         |2 3 10 |

z =  ---------------= 6(60-18)+a(70-12)-8(21-12) = 240+58a = 120+29a

         |6 a 7   |                                                                                    -----------

         |7 6 10 |                                                                                   135-29a

         |2 3 7   |

 

 

entonces se tiene

 

 

          -99+29a                     -522                              120-29a

  x =   -----------               y=  ----------                  z =  -----------

         135-29a                     135-29a                         135-29a

 

reemplazando en cualquier ecuacion se tiene el valor de a

exitos

vemos