2U/3+3V/4=1/2 (1)
4U/5+5V/6=7/15 (2)
(1)*12 得 8U+9V=6 (3)
(2)*30得 24U+25V=14 (4)
(3)*3-(4) 2V=4 v=2 (5)
(5)代入(3) 8U+9*2=6 U=-3/2
2U/3+3V/4=1/2 (1)
4U/5+5V/6=7/15 (2)
(1)*12 得 8U+9V=6 (3)
(2)*30得 24U+25V=14 (4)
(3)*3-(4) 2V=4 v=2 (5)
(5)代入(3) 8U+9*2=6 U=-3/2