Mathematics, 27.04.2021 16:20 Karinaccccc

El doble de mi edad más la edad de mi hermano suman 9 años, y el doble de la edad de mi hermano menos la edad mía son 8 años.

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El doble de mi edad más la edad de mi hermano suman 9 años, y el doble de la edad de mi hermano meno...

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