解下列方程组:
m/2+n/3=13(1)
m/3-n/4=3(2)
3(x+y)-4(x-y)=4(1)
x=y/2+x-y/6=1(2)
x+2y+3z=5(1)
2x+3y+6z=9(2)
5x+3y+9z=15(3)
x+y/2+x-y/6=1(2)不好意思