Question: User: Bookwork code: 4C Calculator not allowed a) Which three of the options below are equations? 60 - 17f 26 = f 19f 5f + 14 f = 7f - 15 f = 13

1. **State the problem:** Identify which three of the given options are equations. 2. **Recall the definition:** An equation is a mathematical statement that asserts the equality of two expressions, and it always contains an equals sign $=$. 3. **Analyze each option:** - $60 - 17f$: This is an expression, no equals sign, so not an equation. - $26 = f$: Contains an equals sign, so this is an equation. - $19f$: Expression only, no equals sign, not an equation. - $5f + 14$: Expression only, no equals sign, not an equation. - $f = 7f - 15$: Contains an equals sign, so this is an equation. - $f = 13$: Contains an equals sign, so this is an equation. 4. **Conclusion:** The three equations are: $$26 = f$$ $$f = 7f - 15$$ $$f = 13$$ These are the options that have an equals sign and assert equality between two expressions.