Сумма двух смежных сторон прямоугольника равна 60 см: 2 = 30 см.
Пусть одна сторона прямоугольника равна х см.
Тогда вторая сторона равна (30 - х) см.
После изменения размеров стороны прямоугольника равны (х - 5) см и (30 - х + 3) см.
Составляем уравнение:
х (30 - х) - (х - 5) (33 - х) = 21;
30х - х 2 - (33х - х 2 - 165 + 5х = 21;
30х - х 2 - 33х + х 2 + 165 - 5х = 21;
-8х = -144;
х = 18
Следовательно, стороны данного прямоугольника равны 18 см и 30 - 18 = 12 (см).
Ответ. 18 см и 12 см.
Временное правительство находилось в состоянии глубочайшего кризиса, народные выступления подавлялись силой. Временное правительство проявило свою полную несостоятельность и беспомощность. В такой ситуации, дабы не допустить скатывания России в состояние анархии и безвластия, генерал Л. Г. Корнилов решил осуществить переворот и установить военную диктатуру. В августе 1917 г. он направил войска к Петрограду. Керенский был напуган и попросил помощи у большевиков, которые разоружили войска Корнилова и арестовали его. В таких условия появилась перспектива установления власти левых сил в стране.
General
1. Does the United Kingdom consist of England, Scotland, Wales and Northern Ireland?
2. Is the UK washed on the westen coast by the Atlantic Ocean and the Irish Sea?
3. Are there many rivers in the country?
4. Can the island of Great Britain be roughly divided into two main regions-Lowland Britain and Highland Britain?
5 Are most of Great Britain's industries concerned with the production of iron and steel goods, textiles and chemicals?
special
1. What countries does the United Kingdom consist of?
2. What ocean is the UK washed on the westen coast by?
3. Where are there many rivers?
4. How many main regions can the island of Great Britain be roughly divided into?
5 What production are most of Great Britain's industries concerned with?
alternative
1. Does the United Kingdom or the United States of America consist of England, Scotland, Wales and Northern Ireland?
2. Is the UK washed on the westen or easten coast by the Atlantic Ocean and the Irish Sea?
3. Are there many rivers or lakes in the country?
4. Can the island of Great Britain be roughly divided into two or three main regions?
5 Are most of Great Britain's industries concerned with the production of iron and steel goods, or textiles and chemicals?
disjunctive
1. The United Kingdom consists of England, Scotland, Wales and Northern Ireland, doesn't it?
2. The UK is washed on the westem coast by the Atlantic Ocean and the Irish Sea, isn't it?
3. There are many rivers in the country, aren't there?
4. The island of Great Britain can be roughly divided into two main regions-Lowland Britain and Highland Britain, can't it?
5 Most of Great Britain's industries are concerned with the production of iron and steel goods, textiles and chemicals, aren't they?