What factors contribute to the increased rigidity of racial segregation and renewed white efforts to exclude blacks from political life in the late 1800s?

One of the main factors is the return to power of white Democratic Party politicians in state legislatures soon after the Reconstruction. At that time, the Democrats were pro-slavery and pro-segregation (President Lincoln is a Republican). Those white pro-slavery democrats want to restrict the rights of now free blacks and so worked hard to pass the so-called Jim Crow laws in state and local governments, and they formed militias to intimidate black voters and political opponents.

april 18, 1775, hundreds of british troops marched from boston to nearby concord in order to seize an arms cache.a confrontation on the lexington town green started off the fighting, and soon the british were hastily retreating under intense fire.

on april 19, 1775, american militia gathered to stop a british company sent from boston to capture supplies allegedly amassed in lexington, massachusetts. the militia fled, and the british left after not finding the supplies.

1.3x - 2 - (3.3x + 5) = 2x + 1

1.3x - 2 - 3.3x - 5 = 2x + 1

-2x - 7 = 2x + 1

-7 = 4x + 1

-8 = 4x

x = -2