Oksana and her three friends are heading to a concert. They paid $540 in total for tickets. This included insurance for $15 for each person. How much was the cost of one ticket to the concert?
Let's first calculate the total cost of insurance for all four people. Oksana and her three friends paid $15 each for insurance, so the total cost of insurance is 4 x $15 = $<<4*15=60>>60.
Now, let's subtract the cost of insurance from the total amount paid to find the cost of the tickets alone. $540 - $60 = $<<540-60=480>>480.
Since there are four people, the cost of one ticket to the concert would be $480 / 4 = $<<480/4=120>>120.
Therefore, the cost of one ticket to the concert is $120.
The total cost of insurance for the four people was $15/person x 4 people = $<<15*4=60>>60.
The total cost of tickets without insurance was $540 - $60 = $<<540-60=480>>480.
The cost of one ticket was $480 / 4 people = $<<480/4=120>>120/person. Answer: \boxed{120}.
To find the cost of one ticket to the concert, we need to subtract the cost of insurance from the total amount paid and then divide the result by the number of people.
Step 1: Calculate the cost of insurance for one person.
The insurance cost for one person is $15.
Step 2: Calculate the total insurance cost for all four people.
Since Oksana has three friends, the total insurance cost for all four of them is:
$15/person * 4 people = $60
Step 3: Subtract the insurance cost from the total amount paid.
The total amount paid for tickets, including insurance, is $540.
We subtract the insurance cost ($60) from the total amount paid to get:
$540 - $60 = $480
Step 4: Divide the remaining amount by the number of people.
There are four people, including Oksana, who paid for the tickets.
Dividing the remaining amount ($480) by four gives us:
$480 / 4 = $120
Therefore, the cost of one ticket to the concert is $120.