### Home > A2C > Chapter 3 > Lesson 3.1.2 > Problem3-31

3-31.

Solve each equation below for $x$. For parts (c) and (d), use the ideas from problem 3-30 so that you do not have to use Guess and Check.

1. $2^{(x+3)} = 2^{2x}$

Recall problem 3-7.

$x = 3$

1. $3^{(2x+1)} = 3^{3}$

See part (a).

1. $9^{x} = 3^{40}$

$9 = 3^{2}$

1. $8^{70} = 2^{x}$

See part (c), or problem 3-30 for guidance.