The list below shows the different taco shells, fillings, and toppings sold at Rico's Taco Bar. Taco Shells
Fillings
Toppings
Soft
Chicken
Cheese
Hard
Beef
Lettuce
Bean
Sour Cream
Onions
Salsa
How many different types of tacos can Rico make using one taco shell, one filling, and one topping?

The correct answer is 7.

Step-by-step explanation:

Let there be x number of candies in each bag filled by Ken and Mali.

Both Ken and Mali started with equal number of candies and put same number of candies in each bag.

Ken filled nine bags and had three candies left. Therefore total number of candies Ken had = 9x + 3.

Mali filled eight bags and had ten candies left. Therefore total number of candies Mali had = 8x + 10.

As both had equal number of candies in the beginning,

9x + 3 = 8x + 10

⇒ x  = 10 - 3 = 7

Thus each bag contained 7 candies.