grilysanchez5 grilysanchez5

24-04-2020
Mathematics

contestada

⎨−3x+3y=9
2x−7y=−14

Respuesta :

Anisatunizzati Anisatunizzati

26-04-2020

Answer:

x = 21/-15

y = 24/15

Step-by-step explanation:

-3x + 3y = 9 | ×2 |

2x - 7y = -14 | ×3 |

-6x + 6y = 18

6x - 21y = -42

__________+

-15y = - 24

y = -24/-15

y = 24/15

-3x + 3y = 9 | ×7 |

2x - 7y = -14 | ×3 |

-21x + 21y = 63

6x - 21y = -42

_____________+

-15x = 21

x = 21/-15

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