Mathematics, 16.07.2021 14:00 juliannasl

There are 40 children in a classroom and n of them do not wear spectacles. (4)/(5) of the boys and (2)/(3) of the girls wear spectacles. Express the number of boys who wear spectacles in terms of n.

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There are 40 children in a classroom and n of them do not wear spectacles. (4)/(5) of the boys and (...