Explain the key events in the relationship between the united states and cuba from the rise of fidel castro to the aftermath of the cuban missile crisis.

The United States backed Fulgencio Batista regime for a long time, but by 1955 there was growing concern that perhaps a change was needed. When Fidel Castro seized power in 1959 he was invited to visit the United States by then-President Eisenhower. Castro claimed his movement and revolution was Liberal National. However, the nationalization of properties and American companies by the Cuban government was taken as aggression.  

In retaliation, the US declared a commercial embargo on Cuba to try to choke Castro's regime. Then in 1961, Kennedy backed a group of Cuban exiles in a coup against Fidel. The invasion was a sound defeat and Castro decided to look for the help of the USSR.  

Nikita Krushov, the Soviet leader, offered Castro economic aid and protection from the US and in exchange asked about placing Nuclear Missiles in the Island. The USSR had recently found out that the US had Missiles placed in Turkey.  

Castro accepted and officially declared that Cuba was now a communist nation. In 1962 the USSR installed missiles in Cuba. But a spy plane discovered them and tense negotiations ensued. Faced with the prospect of Mutual Assured Destruction, Kennedy and Krushov, agreed to remove the missiles from Cuba and Turkey.  

Castro was left out of the negotiations, which damaged Cuba's relationship with the USSR.  

Explanation:

abraham lincoln

simplify brackets

8 - 2a - 7 = a + 40

simplify 8 - 2a - 7 to -2a + 1

-2a + 1 = a + 40

add 2a to both sides

1 = a + 40 + 2a

simplify a + 40 + 2a to 3a + 40

1 = 3a + 40

subtract 40 from both sides

1 - 40 = 3a

simplify 1 - 40 o -39

-39 = 3a

divide both sides by 3

-39/3 = a

simplify 39/3 to 13

-13 = a

switch sides

a = -13