Chris’s internet bill is $45 per month for 100 GB and $0.25 for every 1 GB over. His bill for this month is $65. How many GB over was Chris charged for on this bill?
Let's be accurate as possible. Think before you answer.
80
Let G stand for the number of GB billed, so the total bill is $0.

25G + $45 flat rate charge = $65 total bill.

Now we will solve for G.

$0.

25G + $45 flat rate - $45 = $65 - $45.

This simplifies to $0.

25G = $20.

$0.

25G / $0.

25 = $20 / $0.

25.

G = 80 GB were charged on this bill.

.

So, the final answer is 80