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by navalpike » Sat Aug 15, 2009 11:15 am
At the bakery, Lew spent a total of $6.00 for one kind of cupcake ad one kind of doughnut. How many doughnuts did he buy?

(1) The price of 2 donuts was $0.10 leass than the price of 3 cupcakes
(2) The average price of 1 doughnut and 1 cupcake was $0.35

ans E

Kindly explain your method.

Thanks,
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by kaulnikhil » Sat Aug 15, 2009 12:10 pm
let no of cupcake be x and price of each cupcake be C
let no of doughnut be y and price of each cupcake be d
therefore XC +YD = 6 from question
from1
3c -2D = .10
cant find x and y
from 2
c+d = .70
combining can find c and d
but still cant find x and y
so E
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