Chapter 3 - Solving Inequalities - 3-2 Solving Inequalities Using Addition or Subtraction - Practice and Problem-Solving Exercises - Page 174: 21

$\frac{1}{3}$$\lt$$f$

$0\lt-\frac{1}{3}+f$ Isolate f by add $\frac{1}{3}$ to both sides $0+\frac{1}{3}\lt-\frac{1}{3}+\frac{1}{3}+f$ $\frac{1}{3}$$\lt$$f$ To check, make sure that a number that is greater than $\frac{1}{3}$ $f=1$ $\frac{1}{3}$$\lt$$1$ $true$ $\frac{1}{3}$$\lt$$f$