Килограмм конфет дороже килограмма печенья на 52 р. За 8 кг конфет заплатили столько сколько за 12 кг печенья .Сколько рублей стоит 1 кг конфет.1 кг печенья?

Килограмм конфет дороже килограмма печенья на 52 р. За 8 кг конфет заплатили столько сколько за 12 кг печенья .Сколько рублей стоит 1 кг конфет.1 кг печенья?
- Предмет:
  Математика
- Автор:
  howard20
- 5 лет назад

Ответы 2

А вам спасибо за помощь
- Автор:
  woofie
- 5 лет назад
- 0
Х р- стоимость 1кг конфет, У р- стоимость 1 кг печенья.По условию: Х = У +52; (1)8Х = 12У; (2)Подставим выражение для Х (1) в (2) и получим: 8(У+52) = 12У ; 8У + 8·52; 4У = 8·52; У =104(р);Х = У + 52 = 104 + 52 = 156(р) Ответ: 1 кг конфет стоит 156р, 1кг печенья стоит 104р
- Автор:
  guy38
- 5 лет назад
- 0
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Although the content and character of economics cannot be described briefly, numerous writers have attempted that. An especially useless, though once popular, example is: «Economics is what economists do.»
Similarly, a notable economist of the last century Alfred Marshall called economics «a study of mankind in the ordinary business of life.» Lionel Robbins in the 1930s described economics as «the science of choice among scarce means to accomplish unlimited ends.»
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We may make better progress by comparing economics with other subjects. Like every other discipline that attempts to explain observed facts (e.g., physics, astronomy, meteorology), economics comprises a vast collection of descriptive material organized around a central core of theoretical principles. The manner in which theoretical principles are formulated and used in
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