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Un article trouvé pour ce sujet.
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Simultaneous equations with envelopes |
2007-02-08 |
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Mick pose la question :
There were 17 envelopes bought, some were brown, some were white. The brown envelopes cost one cent more per envelope than the white ones. The total cost was 80 cents. How much of each type of envelope was bought? --Many thanks!
Stephen La Rocque lui répond. |
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