### Home > CCA2 > Chapter 10 > Lesson 10.2.1 > Problem 10-103

10-103.

Use the properties of logarithms to rewrite each equation and then solve. Check for extraneous roots. Homework Help ✎

log(

*x*) + log(*x*+ 21) = 22log

_{4}(*x*) − log_{4}(3) = 2log

_{2}(9*x*+ 5) − log_{2}(*x*^{2}− 1) = 2log

_{7}(*x*+ 1) + log_{7}(*x*− 5) = 1

See the homework help for problem 10-95.

*x* = 4

*x* = 3