En una competición de resistencia los 712 de los participantes se retiran durante la primera hora, y en la segunda hora abandonan 913 de los que quedaban. Si 320 participantes superaron la segunda hora de la prueba, ¿cuántos participantes había al inicio de la competición de resistencia?

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01-11-2022
Mathematics

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En una competición de resistencia los 712 de los participantes se retiran durante la primera hora, y en la segunda hora abandonan 913 de los que quedaban. Si 320 participantes superaron la segunda hora de la prueba, ¿cuántos participantes había al inicio de la competición de resistencia?

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