p+2q=2,2p+q=-4 求p和q的值加起来 3p +3q = -2 p +q = -2/3 p =-4 -( -2/3 ) = -4 +2/3=-3 又 3分之1 q =2 - ( -2/3 )=2又 3分之2 施主,我看你骨骼清奇,器宇轩昂,且有慧根,乃是万中无一的武林奇才....