(3x-2y)/6+(2x+3y)/7=1.(1) (3x-2y)/6-(2x+3y)/7=5.(2) (1)+(2)得 2(3x-2y)/6=6 3x-2y=18.(3) (1)-(2)得 2(2x+3y)/7=-4 2x+3y=14.(4) (3)*3+(4)*2得 13x=82 x=82/13 代入(4)得 164x/13+3y=14 3y=18/13 y=6/13 解得 x=82/13 y=6/13