用恰当的方法解下列方程组.
(1)x-2y=-3,3x+y=5(2)x+2y=1,2x-3y=2(3)5y-3x=10,2x+3y=6(4)2x+3y-2=0,4x+1=9(5)x+y=8,5x-2(x+y)=-1(6)3(x-1)=4(y-4),5(y-1)=3(x+5)