Answer:
-1 /4 d - f
Step-by-step explanation:
Like terms imply that they have the same variables.
Therefore we grouped the "d"s together and the "f"s together.
1/2 d - 3/4 d + 3f - 2f
= (1/2 d - 3/4 d) + (3f - 2f)
= (1/2 - 3/4)d + (3 - 2)f
= -1 /4 d - f
