Chapter 3 - Solving Inequalities - 3-2 Solving Inequalities Using Addition or Subtraction - Practice and Problem-Solving Exercises - Page 174: 22

z $\leq$8

You have z-12$\leq$-4 and you have to solve for x: z-12$\leq$-4 -add 12 to both sides- z$\leq$8 Check that 8 is a solution: 8-12=-4 -4=-4 When graphing, you have a closed circle because 8 is part of the solutions.