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14-06-2017
Mathematics

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Bought three books. Total bill was 150$ if one book cost him 50% more than the other two books combined what was the price of this more expensive book

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Аноним Аноним

14-06-2017

I - 1,5x
II + III - x
-------------------------
1) 1,5x + x = 150
2,5x = 150
x = 150 : 2,5
x = 60 (= I + II)
2) 60 * 1,5 = 90 ( $) - answer.

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