6. What is the value of x in the following system of equations? x + y = -10 y = x – 2

Question

6. What is the value of x in the following system of equations?
x + y = -10
y = x – 2

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Kim Cúc 4 years 2021-09-02T00:32:04+00:00 2 Answers 9 views 0

Answers ( )

  1. danthu
    0
    2021-09-02T00:33:14+00:00
    Reply

    Answer:

    X= -4

    Step-by-step explanation:

    Hello. For to solve that, you need to use the sustitution method:

    1. You need clear X in the first equation and put in the second

    X+Y = -10

    X = -10-Y

    2.  Y = X-2, then you replaced the X in this equation:

    Y = (-10-Y) – 2

    Y+2=-10-Y

    2Y=-10-2

    2Y= -12

    Y= -12/2

    Y=-6

    3. Now you use the Y value for to solve X:

    X=-10-Y, then

    X =- 10-(-6)

    X = -4

  2. minhkhoi
    0
    2021-09-02T00:33:59+00:00
    Reply

    Plug in x-2 for y
    x + x – 2 = -10
    2x = 12, x = 6
    The value of x is 6

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