Предмет: Математика, автор: 12sammi

1,4(3-x)-4,7=0,9-(3-5x)
Найдите корень пж


alexkorst: Уверен, что все знаки правильно расставлены?
12sammi: Расставлены правильно, спасибо за ответ)
alexkorst: А, ну тогда нормально) Если нетрудно поставь моему ответу метку "Лучший ответ"
12sammi: А там точно будет -1,18?
12sammi: А то я посчитала 4,8
alexkorst: Ща я пересчитаю, может и ошибся
alexkorst: Слушай, я пересчитал. У меня также, как и раньше получается. Но может я где знак не так написал, так что, если уверен пиши свой ответ. К тому же он более "красивый"
12sammi: А ты сам считал, я просто на калькуляторе
12sammi: Там же минус на минус дают плюс вроде
alexkorst: Числа умножал, делил на калькуляторе, а знаки менял то сам

Ответы

Автор ответа: alexkorst
1

1,4(3-x)-4,7=0,9-(3-5x)

4,2x-1,4x-4,7=0,9-3+5x

2,8x-4,7=(-2,1)+5x

2,8x-5x=(-2,1)+4,7

-2,2x=2,6

x=1,(18)

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