答:
3m+8x=4-x:8x+x=4-3m,9x=4-3m,x=(4-3m)/9
x(2m+1)=m(1+2x)
2mx+x=m+2mx
x=m
依据题意有:(4-3m)/9-m=2
所以:
4-3m-9m=18
-12m=14
m=-7/6