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6 September, 21:35

5x+4y-5z=-27

2x-3y+4z=15

9x+2y+6z=-3

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Answers (1)
  1. 7 September, 00:28
    0
    Solve for the first variable in one of the equations, then substitute the result into the other equation.

    (-1,-3,2)
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