Предмет: Математика, автор: karinaduloglu1511

Знайдіть значення виразу:

1) 0,4(6с - 12) - 0,4(3с -7) при с = 4 1/6

2) 5 1/7(y−7)−3 3/7(14−y) при y = 0,7.

Ответы

Автор ответа: novoalex
5

Ответ:

1)6 1/5

2)-78

поставь плс лучший ответ)

Пошаговое объяснение:

1)0,4(6с-12)-0,4(3с-7)=2,4с-4,8-1,2с+2,8=1,2с-2=1,2*41/6-2=12/10*41/6-2=

=2/10*41/1-2=82/10-2=8 1/5-2=6 1/5

2)5 1/7(y-7)-3 3/7(14-y)=5 1/7y-36-48+3 3/7y=8 4/7y-84=60/7*7/10-84=6/1*1/1-84=6-84=-78


novoalex: а в чому помилка
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