Two pens and three pencils cost Rs 86. four Pens and a pencil cost Rs. 112. find the cost of a pen and that of a pencil.

• If cost of pen is P and cost of pencil is p, then
  2P+3p= 86; 4P+6p= 172..............(1)
  4P+p=112.................(2)
  from (1) and (2)
  5p=60
  p=12
  and P=25
• 12 years agoHelpfull: Yes(4) No(0)
• 1 pen cost x,let 1 pencil cost y
  2x+3y=86, ...y=(86-2x)/3
  again,
  4x+y=112
  4x+(86-2x)/3=112
  12x+86-2x=336
  10x=250
  x=25,
  y=(86-50)/3=12
• 9 years agoHelpfull: Yes(0) No(0)
• 25 rupees for penand 12 rupees for pencil isthe cost
• 9 years agoHelpfull: Yes(0) No(0)