Which of the following systems has equations that are dependent?

Select one:

a.

2x+2y=6

2x+2y=6

2x-2y=6

2x-2y=6

b.

2x+2y=6

2x+2y=6

4x+4y=4

4x+4y=4

c.

y=-x+3

y=-x+3

y=-x-3

y=-x-3

d.

2x+2y=6

2x+2y=6

y=-x+3

y=-x+3

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