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23 January, 09:51

Solve the system by elimination:

6x+z=21

4x+6y=34

-5y+6z = - 33

+4
Answers (1)
  1. 23 January, 11:12
    0
    Let's solve for x.

    6

    x

    +

    z

    =

    21

    Step 1: Add - z to both sides.

    6

    x

    +

    z

    +

    -

    z

    =

    21

    +

    -

    z

    6

    x

    =

    -

    z

    +

    21

    Step 2: Divide both sides by 6.

    6

    x

    6

    =

    -

    z

    +

    21

    6

    x

    =

    -

    1

    6

    z

    +

    7

    2

    Answer:

    x

    =

    -

    1

    6

    z

    +

    7

    2
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