Including a 5% sales tax, an inn charges $172.20 per night. Find the inn's nightly cost before tax is added.

The cost of the room before the tax is X.

To get the total cost they multiply the cost of the room x by 1 + sales tax rate.

Total cost would be x(1.05)

To find x divide total cost by 1.05:

Cost of room before tax: 172.20/1.05

Cost: $164

$164

Step-by-step explanation:

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