Question

5. Зх - Бу - 19 = 0,
-7x+3y +1 = 0. solve it by elimination method ​

Answer 1

Answer:

x = -2

y = -5

Step-by-step explanation:

Зх - 5у - 19 = 0

3x - 5y = 19

-7x + 3y + 1 = 0

-7x + 3y = -1

Elimination

3x - 5y = 19 | ×7 |

-7x + 3y = -1 | ×3 |

21x - 35y = 133

-21x + 9y = -3

_____________+

-26y = 130

y = 130/-26

y = -5

Elimination

3x - 5y = 19 | ×3 |

-7x + 3y = -1 | ×5 |

9x - 15y = 57

-35x + 15y = -5

____________+

-26x = 52

x = 52/-26

x = -2