Mathematics, 11.11.2020 17:10 w210138937
9. Compreu dos productes i us costen 220 €. La setmana següent feu la mateixa compra i, com que el primer article està rebaixat en un 10 % i el segon un 20 % respecte a la setmana anterior, només us costa 186 €. Quant us costarà la mateixa compra si en una altra ocasió els preus estan rebaixats un 10 % i un 20 %, respectivament, en relació amb els preus de la segona setmana? (R: 157'80 €)
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9. Compreu dos productes i us costen 220 €. La setmana següent feu la mateixa compra i, com que el p...
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