### Home > A2C > Chapter 13 > Lesson 13.1.3 > Problem13-61

13-61.

Solve the following equations. Be accurate to three decimal places. Be sure to check your answers.

1. $7 = 4.2^{x}$

$\operatorname{ln} 7 = x \operatorname{ln} 4.2$

$1.356$

2. $3x^{5} = 126$

$x=\sqrt[5]{42}$

3. $14 = 2 · 4^{x}− 10$

See part (a).