Final answer:
To add or subtract fractions, you need to have the same denominator. In this case, the fractions have the common denominator of (m-4). Therefore, the final answer is (2m - 8)/(m-4).
Step-by-step explanation:
To add or subtract fractions, you need to have the same denominator. In this case, both fractions have the common denominator of (m-4). So, we can add the numerators together: (2m) + (-8) = 2m - 8. The denominator remains the same: (m-4).
Therefore, the final answer is (2m - 8)/(m-4).