2u/3+3v/4=1/2 (1)
4u/5+5v/6=7/15 (2)
(1) 两边同乘以12,化简得8u+9v=6 (3)
(2) 两边同乘以30,化简得24u+25v=14 (4)
(3)*3-(4)得,2v=4,即v=2
将v=2代入（3）得u=-3/2