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  1. Q

    Need Help With Solving Equations with Three Variables

    Yeah, I understand that much. Well thank you for the help, and I guess I will just do it to where I get fractions and deal with her tomorrow. Thanks again.
  2. Q

    Need Help With Solving Equations with Three Variables

    I am not really sure, in all of the problems that she gave us on the worksheet, she said there are no fractions at all, but I don't understand how that can be. But she also said that you have to use two equations at a time and substitute and elimitate.
  3. Q

    Need Help With Solving Equations with Three Variables

    Then it would be... y+4z=21 right? So.. y=-4z+21 Then I have to plug it back into the other equation so with y in it so I can find out z or x?
  4. Q

    Need Help With Solving Equations with Three Variables

    I know that I can do this using the first two equations.. 2x-y+2z=15 (2)-x+(2)y+(2)z=(2)3 So then it would be.. 2x-y+2z=15 -2x+2y+2z=6 After you can cancle out the 2x and -2x left with this.. -y+2z=15 2y+2z=6
  5. Q

    Need Help With Solving Equations with Three Variables

    An example of what I am doing would be this.. 2x-y+2z=15 -x+y+z=3 3x-y+2z=18 My teacher had said that there are no fractions in the answer but I can't figure it out at all, and I have 8 of these problems. I have to solve for (x,y,z) with again no fractions. Please HELP!
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