the cost of 5 chairs and 3 mugs is Rs 1900, and the cost of 8 chairs and 5 mugs is Rs 2900, what is the cost of 5 chairs and 8 mugs?

• I think there is some mistake in given data.
  Price of Mug is coming negative.
  
  Pls check.
• 12 years agoHelpfull: Yes(35) No(11)
• answer:-
  let chairs be x and mugs be y.
  hence,
  5x+3y=1900.....(1)
  &8x+5y=2900.....(2)
  multiply eq (2) by 5 and eq (1) by 8
  we get.
  40x+24y=15200....1
  40x+25y=14500....2
  
  subtract to solve the above eqns
  we get y=700;
  i.e. mugs cost 700 each.thus,eqn 1 lacks 5 mugs to reach desired result.
  so, 5*700=3500 ,add it to 1900
  answer=1900+3500(cost of 5 muge more)=5400
• 10 years agoHelpfull: Yes(6) No(10)
• let chairs be x and mugs be y.
  hence,
  5x+3y=1900.....(1)
  &8x+5y=2900.....(2)
  multiply eq (2) by 5 and eq (1) by 8
  we get.
  40x+24y=15200....1
  40x+25y=14500....2
  
  subtract to solve the above eqns
  we get y=-700;
  
  
  
  multiply eq (2) by 3 and eq (1) by 5
  we get.
  25x+15y=9500....1
  24x+15y=8700....2
  
  subtract to solve the above eqns
  we get x=800;
  
  
  now we want cost of 5 chairs and 8 mugs so
  5x+8y=?
  5*800+8*(-700)=-1600
  
• 10 years agoHelpfull: Yes(2) No(2)
• wrong qns...
• 11 years agoHelpfull: Yes(1) No(4)