college algebra

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12x+4y+2z=-7 (1)
3x-12y+6z=-4 (2)
9x-16y+4z=-3 (3)
solve the system
just need the steps how to do it

  • college algebra -

    I would go for the y's

    3 times the first added to the 2nd --->
    4 times the first added to the 3rd ---->

    you now have two equations with only x and z
    try to finish it.

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