How did the united states act towards european countries

In March 1948, the United States Congress passed the Economic Cooperation Act (more popularly known as the Marshall Plan), which set aside $4 billion in aid for Western Europe. By the time the program ended nearly four years later, the United States had provided over $12 billion for European economic recovery.

Explanation:

the perimeter of a triangle is 69 cm. side a is 5 cm shorter than side b. side c is twice as long as side a. find the length of each side. i need to know how to do it in 2 equations.  

equations:

a = b-5

c = 2a

a + b + c = 69

we need the answer choices to answer the question