Consider the system of linear equations and the matrix equations below. – X+ 3y = 2 4x – 2y = 22 -1 3 Х

Question

Consider the system of linear equations and the matrix equations below.
– X+ 3y = 2
4x – 2y = 22
-1
3
Х
2
4
-2
22
What is the value of x in the equation?
-36
3
7
64

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Thái Dương 3 years 2021-08-24T02:09:28+00:00 1 Answers 17 views 0

Answers ( )

  1. Orla
    0
    2021-08-24T02:11:04+00:00
    Reply

    9514 1404 393

    Answer:

      x = 7

    Step-by-step explanation:

    Using Cramer’s rule, the value of x is …

      x=\dfrac{\left|\begin{array}{cc}2&3\\22&-2\end{array}\right|}{\left|\begin{array}{cc}-1&3\\4&-2\end{array}\right|}

      x = ((2)(-2) -(22)(3))/((-1)(-2) -(4)(3)) = (-4-66)/(2-12) = -70/-10

      x = 7

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