Решить методом подстановки:

{x^2-3y=4
{x+y=6

Решить методом алгебраического сложения:
{x^2-2y^2=-4
{x^2+2y^2=12

Read the situation and make notes which will help you to write the letter.

 a local newspaper has recently published a series of articles about young people. in most of the articles, young people are described as irresponsible, rude and looking only for cheap entertainment. these opinions are mainly based on a few recent incidents in the local discotheque. you're going to write a letter to the editor expressing your disapproval not only with the editorial policy of treating the topic, but also whith the perception of young people.

 
make notes which will help you to write the letter :
-reason(s) for writing your opinion;
-your arguments + suggestions;
-opposing views & your counterarguments;
-closing remarks.

иван котляревський хронологична таблиця