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andrey2020 [161]
2 years ago
14

Chris spent half of his money on a pair of headphones. Then he spends half of his remaining money of recordable CDs. Finally, he

spent his remaining $12.75 on a book. How much money did Chris have to begin with?
Mathematics
2 answers:
otez555 [7]2 years ago
4 0
I think the answer would be $50.50
kompoz [17]2 years ago
4 0
Assume that Chris began with m dollars in his pocket.

Half of that, or m/2, went to purchase a pair of headphones.

Half of that, or (1/2)(m/2), or m/4, went to purchasing CDs.  By now Chris has spent (1/2 + 1/4) of his money:  (3/4)m.  He had (1/4)m left, and that (m/4) = $12.75.

Solve this for m:
         $12.75
m = ------------ = $5 (answer).    
            (1/4)
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