Are these equations inconsistent, consistent, independent or dependent

Question

1. Y=3×-1 and 2y-6×=4

2. 2y=-x+6 and 4y+2x=12

3. Y=2x+3 and ×+y=-9

Answer 1

1. inconsistent. y=3x-1 is the same as 2y=6x-2, but that's inconsistent with 2y-6x+4 which could be rewritten as 2y=6x+4. 2y=6x+4 and 2y=6x-2 are inconsistent. subtract one from the other and you get 0=6 which is false. the 2 equations can never both be true.
2. consistent. They're the same equation. multiply the first by 2 and you get the 2nd
3. independent. they are two lines that intersect at a point. (-3,-3). The two equations have different values of x and y at all points except (-3,-3)