3 customers were kicked out of the Walmart for refusing to wear masks. A number equals to four times that many minus 5 were kicked out for shoplifting.  Three times the number of shoplifters were kicked out for physical violence over goods on sale. If a total of 50 people were kicked out of the Walmart, how many were kicked out for other reasons?
First quadruple the number of customers kicked out for not wearing masks: 4 * 3 customers = 
<gadget id="calculator">4*3</gadget>
<output>12</output>
12 customers.
Then subtract 5 from this number: 12 customers - 5 customers = 7 customers.
Then triple that number to find the number of people kicked out for violence: 7 customers * 3 = 
<gadget id="calculator">7*3</gadget>
<output>21</output>
21 customers.
Then subtract the number of customers kicked out for each known reason to find the number kicked out for other reasons: 50 customers - 3 customers - 21 customers - 7 customers = 
<gadget id="calculator">50-3-21-7</gadget>
<output>19</output>
19 customers.

<result>19</result>