Which system has (1, 3) as the solution?
Which system has infinite solutions?
Which system has (-8, 0) as the solution?
Which system has no solutions?
Which system has (-2, -2) as the solution?
A) x + y = -1
4x + 4y = -4
B) x - 4y = -8
2x - 3y = -16
C) x + y = -4
-3x + 2y = 2
D) 4x + 6y = -12
2x + 3y = 9
E) x - y = -2
3x - y = 0

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A) 4x+4y=-4(multi eq 1 with 4)
4x+4y=-4
subtract both eq
we'll get 0 = 0

thats a right ?

wait thats the 4th one so A= 4

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