将x=1/2m代入方程得:
m-1/4m-1/2=1/2m-1/3m
(1-1/4-1/2+1/3)m=1/2
7/12m=1/2
m=6/7
1/4(-4mm+2m-8)-(1/2m-1)
=-mm+1/2m-2-1/2m+1
=-mm-1
=-85/49
将x=1/2m代入方程得:
m-1/4m-1/2=1/2m-1/3m
(1-1/4-1/2+1/3)m=1/2
7/12m=1/2
m=6/7
1/4(-4mm+2m-8)-(1/2m-1)
=-mm+1/2m-2-1/2m+1
=-mm-1
=-85/49