Slopes

-4X + 9Y = 20

2X + 4Y = 16

X = 0

Y = 1/3X + 4

Y = 5X - 1

Y = 0

-6X - 3Y = 21

Y = 1

X = 9

5X + Y = 15

Y = -1/2X + 4

X = -3

Y = -3

Y = 6

X = 6

Y = -7X