Abox of candies contains caramel chocolates and chocolates with nuts. there are 3 times more caramel chocolates as there are chocolates with nuts. if there are 20 chocolates total, how many are there of each type?

For this case, the first thing we must do is define variables.
 We have then:
 x = caramel chocolates
 y = chocolates with nuts
 We now write the system of equations:
 x + y = 20
 x = 3y
 Solving the system we have:
 x = 15
 y = 5
 
 there are:
 15 caramel chocolates
 5 chocolates with nuts