Question

ln 4 + ln (x-1)=0

Answer 1

Relevant log properties:
ln ab = ln a + ln b
ln 1 = 0

ln 4 + ln (x-1) = 0
Combine into a single logarithm
ln (4(x - 1))
Distribute
ln 4x - 4 = 0
4x - 4 = 1
should be straight forward form here

Answer 2

thank you!