The currency in switzerland is called a franc. on a certain day, one u.s. dollar equaled 1 1/4 swiss france. write and solve a multipcation equation to find the number of u.s. dollars that would equal 15 swiss francs.

The equation is x = y * 4/5  and US$ 12 would equal 15 Swiss Francs

Step-by-step explanation:

1. Let's review all the information provided for solving this question:

1 US$ equivalent to 1 1/4  Swiss Franc

2. Let's write and solve a multiplication equation to find the amount  of US$ that would equal 15 Swiss Francs

x = Amount of US$ equivalent

y = Amount of Swiss Francs

x = y /1.25

x = y / 5/4 (1.25 = 5/4)

x = y * 4/5

Now, let's replace with the real values:

x = 15 * 4/5

x = 60/5

x = 12

US$ 12 would equal 15 Swiss Francs