Обудуйте графік нерівності у>-х* + 6х,

4 (x-y)=-2,

{ 3x-7y=-2,5-2(x+y);

1) Поработаем со вторым уравнением, упростим его.

3x-7y=-2,5-2(x+y)

3x-7y=-2,5-2x-2y

Перенесем выражения с переменными в левую сторону, свободные члены в правую.

3x-7y+2x+2y=-2,5

5x-5y=-2,5 |:5 (поделим все уравнение на пять)

x-y=-0.5

2. Запишем получившуюся систему:

{4 (x-y)=-2

{x-y=-0.5

Раскроем скобки в первом уравнении, получим:

{4x- 4y=-2

{x-y=-0.5

3. Выразим из второго уравнения x.

x-y=-0.5

x=y-0.5

4. Подставим получившийся х в первое уравнение:

4*(у-0.5)-4у=-2

4у-2-4у=-2

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