Mathematics, 27.01.2021 22:50 COOLIOMARIS

7. En una reunió de nois i noies el nombre de noies és 25 vegades més que el de nois. Si surten de la reunió 10 nois i 10 noies, queden el doble de noies que de nois. Quants nois i quantes noies hi havia inicialment a la reunió?

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7. En una reunió de nois i noies el nombre de noies és 25 vegades més que el de nois. Si surten de l...