Ответ учителя по предмету Математика
(х+2/5)-1/3=7/9
х+2/5=7/9+1/3
х+2/5=10/9
х=10/9-2/5
х=32/45
Ответ:х=32/45, сокращаем, получается 7/9
Проверка:
32/45+2/5-1/3=7/9
32/45+2/5=50/45
50/45-1/3=35/45. Сокращаем-35/45=35:5=7, 45_5=9.
Получается 7/9. Вроде бы правильно, если есть ошибки, прости
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