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Math Help - Intersection of 3 planes forming 3 lines

  1. #1
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    Intersection of 3 planes forming 3 lines

    I don't understand plane 1 with plane 3. Where does -4x+3z=13 come from? I don't understand plane 2 with plane 3 either.
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  2. #2
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    Re: Intersection of 3 planes forming 3 lines

    Quote Originally Posted by Stuck Man View Post
    I don't understand plane 1 with plane 3. Where does -4x+3z=13 come from? I don't understand plane 2 with plane 3 either.
    Solve the first equation for x. You get x = -7-2y+2z. Now substitute this for x in the third equation and simplify. The same process applies to plane 2 and 3.
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