1. Let's first state the problem: We want to know if the numbers 7, 8, and 9 can be related or solved using the properties called componendo, alternendo, and invertendo. 2. These properties are used for proportions or ratios, not for solving standalone numbers. They apply when you have an equation of the form $$\frac{a}{b} = \frac{c}{d}$$. 3. Componendo states: If $$\frac{a}{b} = \frac{c}{d}$$, then $$\frac{a+b}{b} = \frac{c+d}{d}$$. 4. Alternendo states: If $$\frac{a}{b} = \frac{c}{d}$$, then $$\frac{a}{c} = \frac{b}{d}$$. 5. Invertendo states: If $$\frac{a}{b} = \frac{c}{d}$$, then $$\frac{b}{a} = \frac{d}{c}$$. 6. Since 7, 8, and 9 are just numbers without any given ratio or proportion, these properties cannot be directly applied to "solve" or relate them. 7. To use these properties, you need a proportion equation involving these numbers, for example, $$\frac{7}{8} = \frac{9}{x}$$, then you could apply these properties to find $$x$$. Final answer: No, 7, 8, and 9 alone cannot be solved using componendo, alternendo, and invertendo without a proportion involving them.