math
posted by diane .
a man purchased 3 item which cost 100 dollars. The second item is half of the first, and the third item is have of the second. How much was each item?

F+ 1/2F+1/4F=100
1.75 FirstCost=100
FirstCost then...100*4/7=400/7=57.14 dollars.
Lets check it.
57.14+ 57.14/2 + 57.14/4 =57.14+28.57+14.29 = 100
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