SOLUTION: You are making iced tea for a friend who prefers it at 80% strength. The function gives the concentration of the tea after adding x fluid ounces of a 50% tea solution to 6 fluid o

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Question 726987: You are making iced tea for a friend who prefers it at 80% strength. The function gives the concentration of the tea after adding x fluid ounces of a 50% tea solution to 6 fluid ounces of 100% strength tea. How many fluid ounces of 50% strength tea should you add to 6 fl oz of 100% strength tea?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
You are making iced tea for a friend who prefers it at 80% strength. The function gives the concentration of the tea after adding x fluid ounces of a 50% tea solution to 6 fluid ounces of 100% strength tea. How many fluid ounces of 50% strength tea should you add to 6 fl oz of 100% strength tea?
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Equation:
tea + tea = tea
0.50x + 1*6 = 0.80(x+6)
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Multiply thru by 100 to get:
50x + 100*6 = 80x + 80*6
30x = 20*6
x = 4 oz (amt. of 50% tea to add)
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Cheers,
Stan H.
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