Work Step by Step
.You have the inequality 8.6+z$\lt$14 and you have to solve for z: 8.6+z<14⟶ subtract 8.6 from each side z<5.4. Check the inequality: 8.6+4 $\lt$14 12.6$\lt$14. It is correct. You graph using an open circle since 5.4 is not included in the solution.