3.Which of the following systems is dependent? A. x − y = 2 and x + y = −2
B. x − y = 2 and −2x + 2y = −4
C. x − y = 2 and 3x − 3y = 2
D. x − y = 2 and −x − y = −2

Question

3.Which of the following systems is dependent?   A. x − y = 2 and x + y = −2 
  B. x − y = 2 and −2x + 2y = −4 
  C. x − y = 2 and 3x − 3y = 2 
  D. x − y = 2 and −x − y = −2

anonymous · Answer

Are you thinking about row reduction?

anonymous · Answer

@rebeccaxhawaii

anonymous · Answer

@Atsie

atsie · Answer

Alright, a dependent system would be a system with many infinite solutions and if these have an answer that is true, then it is for surely a dependent system.
So, looking at A first.
x - y = 2 and x + y = -2
Is this true firstly?