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Mathematics, 08.06.2021 04:40 fzzyy

En el curso de álgebra un profesor pidió resolver 22 problemas al alumno más destacado de la clase, con la condición de que por cada problema resuelto correctamente el estudiante recibiría $15, y por cada problema erróneo, perdería $5. Después de resolver los 22 problemas, el profesor le pagó $170. ¿Cuántos problemas resolvió correctamente el alumno?

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