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Q:

$${3x+4y-2z+9=17},{7x+2y+11z+8=23}$$ and $$ {5x+9y+6z-4=18}$$ then what is  the value of $$ {x+y+z-34}$$?

  • 1
    -45
  • 2
    -31
  • 3
    -14
  • 4
    -28
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Answer : 2. "-31"

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