Равносильны ли системы уравнений:
x+y+1= 0,
3х - 2y - 2 = 0
И
y = 1- х,
5х – 4 = 0?
x+y+1= 0,
3х - 2y - 2 = 0
И
y = 1- х,
5х – 4 = 0?
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Ответ:
Нет.
Равносильны ли системы уравнений?