Solution: Substitute \( m + n = 8 \) into the first equation: \( m \cdot 8 = 24 \), so \( m = 3 \). oxed3Question: A sequence of six real numbers forms an arithmetic progression. The sum of the first three terms is 12, and the sum of the last three terms is 30. What is the sum of all six terms? - Nelissen Grade advocaten