Launch Microsoft PowerPoint. Click on the "New Slide" option in PowerPoint's toolbar to add more slides to your presentation. You'll need to add at least nine slide.
Click the "Text box" option from the toolbar, then draw a text box on the first slide. Hold down your mouse's left button while dragging the cursor. Type an introduction into for your presentation into the text box. Use the text box's floating formatting menu to adjust the size and style of your font.
Click on the next slide in your presentation. Draw two text boxes in the upper half of the slide, then type in the formula for a multi-step proportions (a/b + c/d). Draw a second box beneath the first, then type in a summation of the formula. Follow the same formatting for the rest of the slides in your presentation -- draw two text boxes on the remaining slides.
Type an example equation into the first box on the next slide. Use the second text box to show the example equation cross-multiplied (a x d = b x c). Select the next slide.
Type in your equations with like terms combined. Use the second text box to provide your explanation on how to simply the equation through combining like terms. Move to the next slide in your presentation.
Use the first text box on the next slide to display your example equation with the variable moved to one side. Use the second box to explain how and why you subtracted the variable with the lowest coefficient from each side of the equation. Select the next slide.
Type in your equation with its variable isolated into the first text box. Type your explanation on how to isolate the variable into the second box.
Type in your equation into the first text box with its coefficient dividing each side of the equation. Type your explanation on dividing by the coefficient into the second text box and then move to the next slide.
Type your equation's answer into the first text box on the slide. Use the second text box to invite your students to try some practice equations.
Click the "Save" option from PowerPoint's toolbar to save your work.