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100

8x+y=19

-8x-6y=6

(3,-5)

100

-2x+y=1

2x+y=9

(2,5)

100

-5x-y=-7

5x-3y=-21

(0,7)

100

3x-10y=-22

-3x+4y=-2

(6,4)

100

-8x+8y=8

-8x+7y=11

(-4,-3)

200

-2x+2y=8

9x+2y=8

(0,4)

200

2x-5y=-10

9x-5y=-10

(0,2)

200

-4x+5y=17

-4x+6y=18

(-3,1)

200

2x+10y=12

-3x-5y=12

(-9,3)

200

-2x-3y=4

12x-8y=28

(1,-2)

300

-3x+8y=-9

7x-4y=-23

(-5,-3)

300

5x+y=-29

-6x+9y=-6

(-5,-4)

300

-3x-12y=12

6x-6y=6

(0,-1)

300

5x-8y=3

8x-16y=-8

(7,4)

300

8x-y=9

-9x+9y=-18

(1,-1)

400

-20x-7y=8

10x-3y=22

(1,-4)

400

-5x+6y=-20

3x-3y=12

(4,0)

400

-7x-6y=-1

-6x-12y=6

(1,-1)

400

3x+2y=10

x+3y=50

(-10,20)

400

4x-5y=28

5x-10y=50

(2,-4)