1.
30%+70m%
2.
30%+70%m+(1-30%-70m%)m=43.3%
0.7m^-1.4m+0.133=0
m^+1.9-2m=0
(m-0.1)(m-1.9)=0
m1=0.1
m2=1.9(舍去)
答:0.1