In the evenings into the city and go clubbing or see a movie. a lot of new friends. my pronunciation is much better already, and almost everything. On weekdays Liam. At the moment on their new website and help with it. some useful stuff about how people business in this country.
to see me? the winter holiday skiing with Ryan and Liam. to meet you and there’s plenty of space. You must bring lots of warm clothes because really cold here in the winter. Let me know as soon as . And tell me what these days.
In the evenings into the city and go clubbing or see a movie. a lot of new friends. my pronunciation is much better already, and almost everything. On weekdays Liam. At the moment on their new website and help with it. some useful stuff about how people business in this country.
to see me? the winter holiday skiing with Ryan and Liam. to meet you and there’s plenty of space. You must bring lots of warm clothes because really cold here in the winter. Let me know as soon as . And tell me what these days.
Объяснение:
Составить систему уравнений у меня не получилось
х деталей за час - производительность первого рабочего
(х-4) дет/час - производительность второго рабочего
48 : х + 1 = 48 : (х-4)
(48 + х)/х = 48/(х-4)
(48+х)(х-4) = 48х
48х + х² - 192 - 4х = 48х
48х + х² - 192 - 4х - 48х = 0
х² - 4х - 192 = 0
(Извините, не знаю каким в классе Вы решаете квадратные уравнения. Перехожу сразу к результату.)
х² - 16х + 12х - 192 = 0
х(х-16) +12(х-16) = 0
(х-16)(х+12) = 0
Первый корень уравнения:
х+12 = 0
х = -12 - ответ отрицательный
Второй корень:
х-16 = 0
х = 16 (дет/час) - производительность первого рабочего
ответ: Первый рабочий делает 16 деталей за час