Предмет: Математика, автор: Шуршунчик11

Помогите срочно!!!!!! Вот эти 2

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Автор ответа: elina1220031

1) получается 18целых3/8
2) 12a-2(2a+3в)=12а-4а-6в=8а-6в=2(4а-3в)=2*2=4
Ответ:4

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