### Home > INT3 > Chapter 9 > Lesson 9.1.4 > Problem9-51

9-51.

1. $7 = 4.2^{x}$

Take the log of both sides of the equation.

1. $3x^{5} = 126$

Isolate the $x$ term on one side of the equation.

$x ≈ 2.112$

1. $14 = 2 · 4^{x} – 10$

"Undo" the operations furthest away from $x$ before the operations closer to it.