-6x – 4y = -14 4x – 12y = -20 a. (1, 2) b. (-2, 1) c. (-2,4) d. (-2,-4)

Question

-6x – 4y = -14
4x – 12y = -20

a. (1, 2)
b. (-2, 1)
c. (-2,4)
d. (-2,-4)

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Diễm Kiều 3 years 2021-08-08T01:01:08+00:00 2 Answers 16 views 0

Answers ( )

  1. thuthao
    0
    2021-08-08T01:02:27+00:00
    Reply

    It’s probably A. (1,2) hope this helps..

  2. huyenthanh
    0
    2021-08-08T01:02:57+00:00
    Reply

    Answer:

    A.(1,2)

    Step-by-step explanation:

    Step: Substitute

    −2
    /3
    y +  7
    /3

    4x−12y=−20:

    4x−12y=−20

    4(
    −2
    /3
    y +  7
    /3
    )−12y=−20

    -44/3y +  28
    /3
    =−20(Simplify both sides of the equation)

    −44
    /3
    y +  28
    /3  +  −28
    /3  =−20+  −28
    /3

    (Add (-28)/3 to both sides)

    −44
    /3
    y=  −88
    /3

    −44
    /3
    y

    −44
    /3
    =  −88
    /3  −44
    /3

    (Divide both sides by (-44)/3)

    y=2

    Step: Substitute2foryinx=

    −2
    /3
    y+
    7
    /3
    :

    x=
    −2
    /3
    y+
    7
    /3

    x=
    −2
    /3
    (2)+
    7
    /3

    x=1(Simplify both sides of the equation)

    Answer:

    x=1 and y=2

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