Homework Help Forum: math

Posted by Anna on Thursday, November 5, 2009 at 4:34pm.

One canned juice drink is 25% orange juice another is 5% orange juice. How many liters of each should be mixed together in order to get 20L that is 24% orange juice? How many liters of the 25% orange juice should be in mixture? How many liters of the 5% orange juice should be in mixture? How can I solve this problem, or what is the best method?? I started the problem and got stuck, I first started with x= amount of 25% and y= amount of 5% x+y=20L 0.25x+0.05y=54 100(0.25x+0.05y)=100(54) 25x+5y=5400 is this correct so far? and I am stuck here...

• math - Reiny, Thursday, November 5, 2009 at 5:48pm

  Where does the 54 come from ? The second equation should have been .25x + .05y = .24(20) times 100 ---> 25x + 5y = 480 now multiply your first by 5 5x + 5y = 100 subtract this from the other one... 20x = 380 x = 19 then y = 1

  
  

• math - Anna, Thursday, November 5, 2009 at 5:58pm

  ohhh... thank you.... no wonder why I got stuck.. I missed a step and miscalculated thank you so much

  
  

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