Answer:
f=9
9 squared = 81
81-81=0
Step-by-step explanation:
First you would simplify the left side to get,
ln( ( 3x+1 ) / ( 5+x ) ) = ln 2
Then raise both sides as the power of e, so it would basically cancel out the ln's.
3x+1 / 5+x = 2
3x+1 = 2( 5+x )
3x+1 = 10+2x
x = 9
Step-by-step explanation:

Answer:
5/8z=m
Step-by-step explanation:
z=4m*4m/25
25z=4m*4m
25/16z=2m
5/4z=2m
5/8z=m
Hope this helps!