Question 742182
Solve 
a) 3^x =2
b) 4^x-5
c) 7^(-x)=3
d) 3^(1-x) = 5
e) (1/8)^x = 25
f) 5^(3x) =41
------
These are all similar.
I'll do the "hardest" ones.
Solve 
a) 3^x =2
b) 4^x-5  No equal sign
c) 7^(-x)=3
d) 3^(1-x) = 5
(1-x)*log(3) = log(5)
1-x = log(5)/log(3)
{{{x = 1 - (log(5)/log(3))}}}
-----------------
e) (1/8)^x = 25
x*log(1/8) = log(25)
x = log(25)/log(1/8)
x =~ -1.54795
-----------------
f) 5^(3x) =41