Предмет: Алгебра, автор: Аноним

помогите пожалуйста разобраться :найдите значение выражений:можно пожалуйста в подробностях​

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Автор ответа: kyofq
1
как то так.........возможно надо записать по другому
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1. 54-(48-39)x5-5=
48:(31-19):2+2=

2. 808:8-909:9+424:2-636:3+5=

Решите пожалуйста.
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