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Mathematics, 26.08.2020 16:01 dbhuggybearow6jng

El Sr negron tiene que redactar una serie de cartas en su oficina. A Lourdes le toma 6 horas pasar todas las cartas. A su compañera rosabel, le toma 9 horas en realizar la misma tarea. Si ambas trabajan juntas para hacer todo el trabajo d ela oficina, a. Cuánto tiempo le tomará a ambas realizar el trabajo?

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El Sr negron tiene que redactar una serie de cartas en su oficina. A Lourdes le toma 6 horas pasar t...
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