Question

5x-4y=-1,2x-y=5 solve it by Elimnation method​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

$\huge\underline\bold\red{Answer!!}$

$5x - 4y = - 1 = = = = = = > (1)$

$2x - y = 5 = = = = = = = > (2)$

Multiply the first equation by 2 and second equation by 5, so that the x's will cancel out:

$10x - 8y = - 2$

$10x - 5 y = 25$

 ‎ ‎  ‎ ‎ (+) ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ (-)

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$\: \: \: \: \: \: \: \: \: \: - 3y = - 27$

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 ‎ Then subtract:

$- 3y = - 27$

$y = 9$

substitute y back into one of the original equation

( I choose 5x-4y=-1 )

$5x - 4 ( 9) = - 1$

$5x - \: 36 = - 1$

$5x = - 1 + 36$

$5x = 35$

$x = \dfrac{35}{5}$

$x = 7$

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