1.Является ли решением системы уравнений 3х + у=2 пара чисел а)(1;1) б (1; -1) 2.Решите

1.Является ли решением системы уравнений 3х + у=2 пара чисел а)(1;1) б (1; -1)
2.Решите систему уравнений методом подстановки х-у= 1 х+2у = 3
3.Решите методом алгебраического сложения систему уравнений х-4 у = 5 -х +3у=2
5.Сумма цифр двузначного числа равна 9 если разность цифр =5 то получится 5 Найдите это число
- Предмет:
  Алгебра
- Автор:
  ladybugwqdq
- 6 лет назад

Ответы 1

1. только Б.2. x-y=1 x=3-2y------------(3-2y)-y=13-2y-y=1-2y-y=1-3 -4y=-2у=2х-2=1х=3.3
- Автор:
  elyse
- 6 лет назад
- 0
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