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
лайк
Объяснение:
Love you ❤️️
Объяснение:
Love you ❤️️
Love you ❤️️
Love you ❤️️
Love you ❤️️
Love you ❤️️
Love you ❤️️
Love you ❤️️
Love you ❤️️
Love you ❤️️
Love you ❤️️
Love you ❤️️
Love you ❤️️
Love you ❤️️
Love you ❤️️
Love you ❤️️
Love you ❤️️
Love you ❤️️
Love you ❤️️
Love you ❤️️
Love you ❤️️
Love you ❤️️
Love you ❤️️
Love you ❤️️
Love you ❤️️
Love you ❤️️
Love you ❤️️
Love you ❤️️
Love you ❤️️
Love you ❤️️
Love you ❤️️
Love you ❤️️
I'm on my way ️
I'm on my way ️
I'm on my way ️
I'm on my way ️
I'm on my way ️
I'm on my way ️
I'm on my way ️
SAY YOU ARE MY BAKA
SAY YOU ARE MY BAKA
SAY YOU ARE MY BAKA
SAY YOU ARE MY BAKA
SAY YOU ARE MY BAKA
SAY YOU ARE MY BAKA
SAY YOU ARE MY BAKA
SAY YOU ARE MY BAKA
SAY YOU ARE MY BAKA
SAY YOU ARE MY BAKA
SAY YOU ARE MY BAKA
SAY YOU ARE MY BAKA
SAY YOU ARE MY BAKA
SAY YOU ARE MY BAKA
SAY YOU ARE MY BAKA
SAY YOU ARE MY BAKA
SAY YOU ARE MY BAKA
SAY YOU ARE MY BAKA
SAY YOU ARE MY BAKA
SAY YOU ARE MY BAKA
SAY YOU ARE MY BAKA
SAY YOU ARE MY BAKA
SAY YOU ARE MY BAKA
SAY YOU ARE MY BAKA
SAY YOU ARE MY BAKA
SAY YOU ARE MY BAKA
SAY YOU ARE MY BAKA
SAY YOU ARE MY BAKA
SAY YOU ARE MY BAKA
SAY YOU ARE MY BAKA
SAY YOU ARE MY BAKA
SAY YOU ARE MY BAKA
SAY YOU ARE MY BAKA
SAY YOU ARE MY BAKA
SAY YOU ARE MY BAKA
SAY YOU ARE MY BAKA
SAY YOU ARE MY BAKA
SAY YOU ARE MY BAKA
х-9х-17=7
-8х=17+7
-8х=24
х=-3
2у=9•(-3)+17
2у=-10
у=-5
Проверка:
-3-2•(-5)=7
-3+10=7
7=7
ответ: х=-3,у=-5.