Предмет: Математика, автор: ersovaulia709

6. Розв'язком системи рівнянь 2x-y=1 x+y=2
​

Ответы

Автор ответа: Khodanovich1979
1

Відповідь:

х=1

у=1

Покрокове пояснення:

х=2-у

підставим в друге рівняння

2(2-у)-у=1

4-2у-у=1

-3у=1-4

-3у=-3

у=1

х=2-1

х=1

ersovaulia709: там має бути дві відповіді
Khodanovich1979: так і є х=1 у=1
ersovaulia709: а ще одне завданя допоможеш рішити
ersovaulia709: даю 20 балів
Предыдущий вопрос
Следующий вопрос
Похожие вопросы
Предмет: Английский язык, автор: DashaZhovnirenko
ВСТАВИТЬ НУЖНЫЕ СЛОВА!!! СРОЧНО!!!!!!
Old Margaret was just the kind of cook that we wanted. Lots of cooks can do rich dishes
well. Margaret couldn’t. But she 1_______________ to cook simple, everyday dishes in a way
that made our mouths water. Her apple-pies were the best pies I’ve ever tasted.
But to 2_______________ the truth, even Margaret sometimes miscalculated. A large,
royal-looking steak would be set before Father, which, upon being cut into, would turn
3________________ to be underdone. Father’s face would darken with disappointment. He would
raise his foot and stamp slowly and heavily three times on the rug.
At this solemn 4_______________ , we would hear Margaret leave the kitchen below us and
come up the stairs to the dining-room door.
“Margaret, look at the steak.”
Margaret would peer with a shocked look at the platter. She would then seize the platter and
make off with it.
Father and Margaret were united by the intense interest they both took in cooking.
Each understood the other instinctively. I have to 5______________ that they had a complete
fellow-feeling. Mother’s great interest was in babies. She loved her children and her happiness depended 6__________________ them. She wanted to keep Father pleased somehow, and if it
was too difficult or impossible she didn’t always care about even that.
At table it was Father who carved the fowl, or sliced the roast lamb or beef. I liked to
7___________________ him take the knife and go at it. And usually the cooking had been as
superb as the carving. Sometimes it was so perfect that Father would summon Margaret and say in a
low voice, “You are a good cook”.
1. A) used B) kept C) held D) took
2. A) speak B) tell C) talk D) say
3. A) out B) of C) over D) into
4. A) sign B) signal C) gesture D) movement
5. A) accept B) agree C) admit D) adopt
6. A) on B) of C) in D) at
7. A) look B) see C) gaze D) watch
1 год назад
Предмет: Окружающий мир, автор: tamuna25
как животные связаны с растениями? приведи примеры
1 год назад
Предмет: Другие предметы, автор: Виктория23487
Как вы понимаете пословицу kleine geschenke erhalten die freundschaft (на немецком)
1 год назад
Предмет: Математика, автор: 09aibika
Капроновый шнур длиной 30 м разрезали на 3 части. Причём одна из них на 1 м больше другой и на 1 м меньше третьей. Найди длину каждой части.
7 лет назад
Предмет: Математика, автор: БРОТЕЛО
3b-11 если b=5 b=100
7 лет назад