80x+160y=20 2x+6y=0.7

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80x+160y=20
2x+6y=0.7

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Nem 5 years 2020-11-05T00:05:44+00:00 1 Answers 184 views 0

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  1. Nick
    0
    2020-11-05T00:07:15+00:00
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    Có

    `80x+160y=20`

    `=> 80(x+2y)=20`

    `=> x +2y=1/4`

    `=> 2x + 4y = 1/2`

    Lại có `2x+6y=0,7`

    `=> 2y = 1/5`

    `=> y = 1/10`

    `=> x = 1/4 – 1/5=1/20`

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