Algebra Question

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I need to solve the system of equations letting z be the parameter

7x+y+7z=-12
-3x+4y+6z=-1

This is suppose to be the right answer
{-47/31-22/31z-43/31-63/31z,z}

I keep getting
{-22/31-47-31z-63/31-43/31z,z}

  • Algebra Question -

    7x+y+7z=-12
    -3x+4y+6z=-1

    28x+4y+28z=-48
    -3x+4y+6z=-1
    subtract bottom eq
    31x-22z=-47
    x= -47/31 +22/31 z

    You can do the x.

  • Algebra Question -

    7x+4y=-16
    6x-4y=-36

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