Asked by Anonymous
                2/5 of a box of 40 chocolates were pralines. After some pralines were eaten, the fraction of pralines in the box became 1/3. How many pralines were eaten?
            
            
        Answers
                    Answered by
            Anonymous 
            
    2/5 * 40 = 16 pralines
3/5 * 40 = 24
24 * 1/3 = 8
16 / 8 = 2 pralines were eaten
    
3/5 * 40 = 24
24 * 1/3 = 8
16 / 8 = 2 pralines were eaten
                    Answered by
            Anono
            
    2/5 * 40 = 16 pralines
40 - 16 = 24 other chocolates
So we start with:
16 + 24 = 40
After x pralines are eaten, we have:
(16 - x) + 24 = 3(16 - x)
24 = 2(16 - x)
12 = 16 - x
x = 4
Check:
16 - 4 = 12
12 + 24 = 36
12 is 1/3 of 36.
    
40 - 16 = 24 other chocolates
So we start with:
16 + 24 = 40
After x pralines are eaten, we have:
(16 - x) + 24 = 3(16 - x)
24 = 2(16 - x)
12 = 16 - x
x = 4
Check:
16 - 4 = 12
12 + 24 = 36
12 is 1/3 of 36.
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