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9 August, 16:51

Solve each system by elimination

X-4y-z=16

X=-2

Y=3z-3

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Answers (1)
  1. 9 August, 18:42
    0
    Fill in x=-2 and y=3z-3 into the first equation. - 2-4 (3z-3) - z=16. - 2-12z+12-z=16. - 13z+10=16. - 13z=6. Z=-6/13. Then you fill in z into y=3z-3. 3 (-6/13) - 3. - 18/13-3. - 18/13-39/13. Y=-57/13. The answer is (-2,-57/13,-6/13).
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