How did the New York City community of Harlem become an exclusively African American neighborhood in the twenties?

As many as several hundred farmed the Harlem flatlands. Between 1637 and 1639, a few settlements were established. The settlement of Harlem was formally incorporated in 1660 under the leadership of Peter Stuyvesant. During the American Revolution, the British burned Harlem to the ground.

Explanation:

the graphs indicate that few people in bolivia work in industry, as that is the least expressive sector shown in the respective graphic.

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