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Mathematics, 12.03.2021 01:00 ash0470

A catarina comprou 15 cartazes a preto e branco e 3 a cores e pagou 54,60€. Um cartaz a preto e branco custa menos 2,30€ do que um a cores. Quanto custa um cartaz a cores?

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A catarina comprou 15 cartazes a preto e branco e 3 a cores e pagou 54,60€. Um cartaz a preto e bran...
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