Question

5x-4y=-4
5x=4y-20

Answer 1

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Answer 2

re-write it with x & y on the same side:
5x-4y=-4
5x-4y=-20
if you subtract second eq from the first youll have:
0=16 which is not true,
so - there is not solution :)

Answer 3

then can you graph this or not

Answer 4

you can graph each equation separately, but lines are not intersect; intersection of two lines = solution; you don't have one
so - you graph = two parallel lines