If x(x+y+z)=20, y(x+y+z)=30, & z(x+y+z)=50, then the value of 2(x+y+z) is:

  1. 10
  2. 15
  3. 18
  4. 20
Anurag Mishra Professor Asked on 10th December 2015 in Maths.
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    Answer:  (4) 20 

    Anurag Mishra Professor Answered on 10th December 2015.
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