The dinner bill for 6 friends came to $150. Silas said he would pay for half of the bill and the remaining friends could split the rest of the bill and leave a 10% tip for the whole meal. How many dollars will one of the friends pay?
Silas paid half = 150/2 = 
<gadget id="calculator">150/2</gadget>
<output>75</output>
75.
Remaining bill paid by 5 friends = 75 + 10% of 150 = 75 + 15 = 90.
Each person will pay 1/5 which is 90/5 = 
<gadget id="calculator">90/5</gadget>
<output>18</output>
18.
Each friend will pay $
<gadget id="calculator">18</gadget>
<output>18</output>
18.

<result>18</result>