Question

Log(1-2x) = 1
Find x.

Answer 1

Whenever they don't tell you what the base of the log is, just assume it's 10.

Log(1-2x) = 1
10^1 = 1-2x
9=-2x
x=-9/2

To confirm that this is correct, put it back into the original equation and see if you get 1

Log(1-2(-9/2) = Log(1+9) = Log(10)
Log(10) = 1

Which is true.