Предмет: Математика, автор: nurtdinov11Sneyti

1)Вычислите: 42: – 15,6+1.
2)Решите уравнение:1,2х-0,6=0,8х-27.
3)В первый час автомашина прошла намеченного пути. Каков намеченный путь, если в первый час автомашина прошла 70 км?
4)Найдите неизвестный член пропорции 7 :2 =4:у..
5)Решите задачу уравнением. За два дня на элеватор отправили 574 т зерна, причем в первый день в 1,8 раза меньше , чем во второй. Сколько тонн зерна было отправлено в первый день и сколько – во второй?

Ответы

Автор ответа: veselaya3
4
1) -2.8
2)1,2х-0,6=0,8х-27
1,2х-0.8х=-27+0.6
0,4х=-26,4
х=-66

nurtdinov11Sneyti: Спасибо)
veselaya3: Надеюсь все правильно
nurtdinov11Sneyti: А можете сделать 5?)
veselaya3: я сама сейчас занята решением задач по геометрии,завтра кюр
veselaya3: к.р
nurtdinov11Sneyti: Ясно
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