This is an AUTO-RUN, 4-minute, 8-chart PowerPoint mini-lesson on how to solve a linear equation in one variable. Contents: 1) Example and solution 2) Technique, 3) Exercise, 4) Solution, 5) Test, 6) Marking scheme. It is well structured with animations, transition effects, sounds, and timings. This PowerPoint file can be used as a template for other lessons. The timings are set for fast-learning students. For slow students, remove countdown timer and reset or remove PowerPoint timing of each slide. SPECIAL FEATURE: A visible 30-second countdown timer is installed on each slide.