This document discusses solving inequalities using addition and subtraction. It provides examples of writing inequalities from words and graphs, as well as solving inequalities algebraically. Specifically, it shows how to write an inequality describing a speed limit of 45 mph or a child needing to be taller than 40 inches. It also demonstrates how to write inequalities from graphs and solve examples algebraically such as 9 ≥ x + 7 and -2 < y + 15, graphing the solutions.