System of Equations – Substitution 5x – 4y = -12 3x – 8y = 32 ​

Question

System of Equations – Substitution

5x – 4y = -12
3x – 8y = 32
​

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bonexptip 4 years 2021-08-13T07:01:31+00:00 1 Answers 11 views 0

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  1. Orla
    0
    2021-08-13T07:03:24+00:00
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    Answer:

    1. x+2y=6 or x=6-2y

    3x-2y=2

    3(6-2y)-2y=2

    18-6y-2y=2

    18-8y=2

    -8y=-18+2

    -8y=-16

    y=-16/-8

    y=2 ans.

    x+2*2=6

    x+4=6

    x=6-4=2 ans.

    Proof:

    3*2-2*2=2

    6-4=2

    2=2

    I leave the rest for you to practice with.

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )