А). (1/2)^x=8
(1/2)^x= 2^3
(1/2)^x=(1/2)^-3
x=-3
б). 3^(2x+1)=27
3^(2x+1)=3^3
2x+1=3
2x=2
x=1
в).log3(x)=2
x=3^2=9
г). log1/3(4x+1)=2
ОДЗ: 4x+1>0
x>-1/4
log1/3(4x+1)= log1/3(1/9)
4x+1=1/9
4x=1/9-1
4x=-8/9
x=-2/9
(42071-970*40)*7000-48000/80+256740*600=176940400