Предмет: Математика, автор: Аноним

а)Туристы должны были пройти за два дня 48 км.В первый день они находилисьв пути 6 часов.Во второй день,увеличив скорость на 2 км/ч,они были в пути 4 часа. С какой скоростью шли туристы в первый день.

б)Обозначь буквой Х скорость туристов в первый день и запиши пояснения к выражениям.

  Х км/ч--скорость туристов в первый день.

 (Х+6) км--   ___

 (Х+2) км/ч --  ___

 ((Х+2)*4) км --  ___

 в) Запиши уравнение и реши его.

ЗАРАНЕЕ СПАСИБО!!!

 

Ответы

Автор ответа: Виолетта19
0

пусть х- км/ч. в первый день, тогда х+2- во второй день. Зная расстояние и время составим и решим уравнение:
х*6+(х+2)*4=48 
10х+8=48
10х=40
х=40:10
х=4
ответ: 4 км/ч скорость в первый день.
х+2-скорость во второй день
(х+2)*4-расстояние пройденное во второй день.
а х+6 извини не знаю 

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