The cost of one pencil, two pens and four erasers is Rs.22 while the cost of five pencils, four pens and two erasers is Rs.32.How much will three pencils, three pens and three erasers cost?

• Ans is:27
  1x+2y+4z=22
  5x+4y+2z=32
  ---------------------
  6x+6y+6z=54
  ---------------------
  6 pencil 6pens 6 eraser cost is =54
  So 3 pencil 3pens 3 eraser =54/2=27
• 9 years agoHelpfull: Yes(10) No(1)
• let the cost of pencil,pen,eraser be x,y,z
  then
  x+2y+4z=22...........(1)
  5x+4y+2z=32.........(2)
  eq 1+2 we get
  6x+6y+6z=54
  so 3x+3y+3z=27
  so 3 pencil,3pen,3 eraser cost will be 27.
• 9 years agoHelpfull: Yes(1) No(0)
• let a be pencil, b be pen ,c be eraser,
  1a+2b+4c=22
  
  5a+4b+2c =32
  so after adding the above equation we get,
  6a+6b+6c =54,
  so for 3pencils 3pens 3 eraser will be,
  6a/2+6b/2+6c/2 =54/2
  =3a+3b+3c=27 is the ans...
• 8 years agoHelpfull: Yes(0) No(0)
• 3x+3x+3x=54/2=26
• 8 years agoHelpfull: Yes(0) No(0)
• Answer is 27.
  
  1x+2y+4z=22
  5x+4y+2z=32
  ---------------------
  6x+6y+6z=54
  ---------------------
  6 pencil 6 pens 6 eraser cost is =54
  So 3 pencil 3 pens 3 eraser =54/2=27
• 6 years agoHelpfull: Yes(0) No(0)