one
x+y=6
y=-x+6
x-y=4
y=x-4
2x+y=8
y=-2x+8
x+2y=10
y=-1/2x+5
3x+y=12
y=-3x+12
2x+3y=9
y=-2/3x+3
4x−y=7
y=4x−7
5x+2y=6
y=-5/2x+3
3x−2y=8
y=3/2x-4
6x+3y=12
y=-2x+4
−2x+y=5
y=2x+5
3x+4y=−8
y=-3/4x-2
−4x−2y=6
y=-2x-3
7x−3y=−9
y=7/3x+3
−5x+2y=10
y=5/2x+5
8x−4y=−12
y=2x+3
12x+5y=−20
y=-12/5x-4
−7x−3y=15
y=-7/3x-5
4x+6y=12
y=-2/3x+2
6x−4y=8
y=3/2x-2
10x+5y=15
y=-2x+3
3x+6y=−12
y=-1/2x-2
8x+6y=18
y=-4/3x+3
-6x+4y=12
y=3/2x+3
9x-6y=-18
y=3/2x+3