### Home > A2C > Chapter 4 > Lesson 4.1.2 > Problem 4-21

4-21.

Solve for

*z*in each equation below. Homework Help ✎4

=8^{z}4

^{2}^{z}^{/3}= 8^{(}^{z}^{+2)}3

= 81^{z}^{2}5

^{(}^{z}^{+1)/3}= 25^{1/}^{z}

Change to a common base.

See part (a).

See part (a).

*z* = 8

See part (a).