Example I Represent the following financial situations numerically: a) John has R120 in his wallet. b) John has no money in his wallet. c) John has no money and borrows R200 from Susan. Solution

Let's represent each financial situation numerically using a single-letter identifier for John's total amount of money. 1. **Situation a**: John has R120 in his wallet. - Let \( J \) represent John's total amount of money. - Therefore, \( J = 120 \). 2. **Situation b**: John has no money in his wallet. - Here, \( J = 0 \). 3. **Situation c**: John has no money and borrows R200 from Susan. - Initially, John has no money, so \( J = 0 \). - After borrowing R200, his total amount becomes: \[ J = 0 + 200 = 200 \] In summary: - For situation a: \( J = 120 \) - For situation b: \( J = 0 \) - For situation c: \( J = 200 \)