The amount of data left on a cell phone plan is 6gb after 8 days 1.5 gb of the data is used each day how much data is available at the beginning of the cycle

⇒ The data which was available at the beginning of the cycle = 18 GB  

Step-by-step explanation:

Amount of data used each day = 1.5 GB

Also, The amount of data left after 8 days usage = 6 GB

So, The amount of data used in 8 days = 8 × 1.5

⇒ The amount of data used in 8 days = 12 GB

And the amount now left for usage = 6 GB

And we need to calculate the data which was available at the beginning of the cycle

⇒ The data which was available at the beginning of the cycle = Data used in 8 days + Data left for usage after 8 days

⇒ The data which was available at the beginning of the cycle = 12 + 6

⇒ The data which was available at the beginning of the cycle = 18 GB