1.
elimination\:x+y=3,\:x-y=1
1.
elimination\:x+y=3,\:x-y=1
2.
elimination\:x+y=7,\:x-y=5
2.
elimination\:x+y=7,\:x-y=5
3.
elimination\:y=-2,\:-3y+4x=18
3.
elimination\:y=-2,\:-3y+4x=18
4.
elimination\:x+y=150,\:x=y+260
4.
elimination\:x+y=150,\:x=y+260
5.
elimination\:x-y=3,\:x+y=21
5.
elimination\:x-y=3,\:x+y=21
6.
elimination\:12x+2y=7,\:y=x+5
6.
elimination\:12x+2y=7,\:y=x+5
7.
elimination\:x+y=8,\:x-y=-4
7.
elimination\:x+y=8,\:x-y=-4
8.
elimination\:8x-2y=12,\:7x+3y=15
8.
elimination\:8x-2y=12,\:7x+3y=15
9.
elimination\:60x-40y=30,\:-40x+90y=-10
9.
elimination\:60x-40y=30,\:-40x+90y=-10
10.
elimination\:12x+13y=9,\:15x-23y=6
10.
elimination\:12x+13y=9,\:15x-23y=6
