Answer :
Answer: Soledad used 87 GB in the first six month.
Step-by-step explanation:
Since we have given that
Amount of space in hard drive of computer = 400 GB
After 6 months,
Amount of space in hard drive of computer = 313 GB
Let the amount of hard drive space she used in first six months be 'x'.
According to question, it becomes,
[tex]400-x=313\\\\400-313=x\\\\87=x[/tex]
Hence, Soledad used 87 GB in the first six month.