Question

ajuda!!!! x+y+2z=8 -x-y+3z=1 3x-y+4z=10

Answer 1

  X + Y + 2 Z = 8
- X  - Y + 3 Z = 1
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0      0  + 5 Z = 9
Z = 9/5

     X + Y  + 2 Z = 8
   3 X - Y + 4 Z = 10
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4 X + 6 Z = 18
4 X + 6 . 9/5 = 18
4 X + 54/5 = 18
4 X = 18 - 54/5
4 X = 90/5 - 54/5
4 X = 36/5
X = 36/5 . 1/4
X = 36/20 SIMPLIFICA  = 9/5
3 X - Y + 4 Z = 10
3.9/5 - Y + 36/5 = 10
27/5 - Y + 36/5 = 10
63/5 - Y = 10
63/5   - 10 = Y
63/5 - 50/5 = Y
Y = 13/5

X = 9/5
Y = 13/5
Z = 9/5