Question 22271
Add logx to both sides to get:
  log(x-9) + log x = 1

By the product law you get the following:
  log(x-9)x =1

Assuming you are using base ten you get the following:
  x(x_9)=10^1
  x^2-9x-10=0

Factor and solve for "x".
Check your answers in the original statement of the problem.

Cheers,
Stan H.