Five shirts together cost $85. Of the 5 shirts, there are 3 shirts that cost $15 each. If the remaining shirts are each equal in value, what is the cost, in dollars, of one of the remaining shirts?
The first 3 shirts cost 15*3=<T>multiply(15, 3)=45 dollars in total.
There are 5-3=<T>subtract(5, 3)=2 shirts remaining.
The remaining 2 shirts cost 85-45=<T>subtract(85, 45)=40 dollars in total.
One of the remaining shirts costs 40/2=<T>divide(40, 2)=20.0 dollars.
