SOLUTION: Mr. Lucky is going to invest some money in the stock market. The first stock he invests in allows him to double his original investment. He then takes his money out of that stock a

Question 167223: Mr. Lucky is going to invest some money in the stock market. The first stock he invests in allows him to double his original investment. He then takes his money out of that stock and invests in a new stock, and he loses $4000. He then tries a third stock; he is lucky and triples his money. With the fourth stock, he loses $10,000, but with the fifth stock he again doubles his money. With the sixth and last stock, he loses $4000. At this point, he leaves the stock market completely with the sum of $12,000. How much was Mr. Lucky's original investment?
Answer by Mathtut(3670) (Show Source): You can put this solution on YOUR website!
so lets call P the initial investment
(((((P+P)-4000)3)-10000)2)-4000=12000
(2P-4000 ) (3)=6P-12000
now subtract 10000 =6P-22000. multiply that by 2=12P-44000 subtract 4000 and that equals 12P-48000=12000 so 12P=60000
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