06-04-2020
Mathematics

contestada

Mama jest trzy razy starsza od córki, a babcia jest dwa razy starsza od mamy. Córka, mama i babcia mają razem 120 lat. Ile lat ma córka? Wybierz poprawną odpowiedź spośród podanych.

A.6 B.7 C.12 B.20

Respuesta :

06-04-2020

x----daughter

3x---mom

2*3x---grandmother

x+3x+2*3x=120

10x=120 //:10

x=12

Daughter is 12 years old.

C.

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