Which system has (-2, -2) as the solution?
which system has no solutions?
which system has infinite solutions?

a. x + y = -1
4x + 4y = -4
b. x + y = -4
-3x + 2y = 2
c. 4x + 6y = -12
2x + 3y = 9
d. x - y = -2
3x - y = 0
e. x - 4y = -8
2x - 3y = -16

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