The answer is x equals 1/2.
If one U.S. dollar is as much as 1.68 Swiss francs, then 79,00 U.S. dollars will be as much as 79,00 * 1,68, which is 132,72 Swiss francs.
I hope it will help :)
Answer:
105
the whole triangle adds up to 180
72+3=75
180-75=105