Ответ учителя по предмету Алгебра
Пусть х(кар)-в 1-ой коробке
Тогда 2х(кар)-во 2-ой коробке
Затем (х-5) стало в 1-ой коробке
То (2х+3) стало во 2-ой коробке
Поусловию задачи в двух коробках вместе стало 22 карандаша
(х-5)+(2х+3)=22
х-5+2х+3=22
3х-2=22
3х=22+2
х=24:3
х=8
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Даю 20 балов