2x+3y=6 (1)
3x-2y=-2 (2)
(1)×3得 6x+9y=18 (3)
(2)×2得 6x-4y=-4 (4)
(3)-(4)得 13y=22
y=22/13
代入(1)得 2x+66/13=6
x=6/13