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CaHeK987 [17]
2 years ago
8

X-Y-2Z =-11 X-2Y-Z = -11 -X+Y+3Z = 14

Mathematics
1 answer:
Snowcat [4.5K]2 years ago
7 0

9514 1404 393

Answer:

  (X, Y, Z) = (-2, 3, 3)

Step-by-step explanation:

We can subtract the second equation from the first to get ...

  Y -Z = 0

We can add the third equation to the first to get ...

  Z = 3

Then ...

  Y -3 = 0   ⇒   Y = 3

and ...

  X -3 -2(3) = -11

  X = -2 . . . . . . . . . add 9

The solution is ...

  (X, Y, Z) = (-2, 3, 3)

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