Answer:
See the attachment
Explanation:
In this context, "x" stands for "a number". Then 1/2x is "one-half of a number" and 3/4x is "three-fourths of a number."
3/4 - ( ) means "three-fourths minus ..."
( ) + 1/2 means "one-half more than ..." or "the sum of ... and one-half."
Putting these ideas together lets you choose the phrases as indicated below.