Solve the System Of Equations (any variable works) 4x + 6y – z = -18 3x + 2y – 4z = -24 -5x + 3y + 2z = 15

Question

Solve the System Of Equations (any variable works)

4x + 6y – z = -18
3x + 2y – 4z = -24
-5x + 3y + 2z = 15

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Vân Khánh 3 years 2021-09-03T01:48:32+00:00 1 Answers 0 views 0

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    2021-09-03T01:49:53+00:00

    Answer:

    Step-by-step explanation:

    8x + 12y – 2z = -36

    -5x + 3y + 2z= 15

    3x + 15y = -21

    3x + 2y – 4z = -24

    -10x + 6y + 4z = 30

    -7x + 8y = 6

    3x + 15y = -21

    -21x + 24y = 18

     21x + 105y = -147

    129y = -129

    y = -1

    3x – 15 = -21

    3x = -6

    x = -2

    -8  – 6 – z = -18

    -14 – z = -18

    -z = -4

    z = 4

    x = -2, y = -1, z = 4

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