No gallery was provided, but anyways -
Those extermination camps were in close proximity to railway systems and ghettos (enclosed community of Jews). For the goal to be fulfilled, the Nazis had to put the Jews in these ghettos, so, they could later transport them (via train) to the camps.
In 1781 end of the revolutionary war
First subtract the 2 to isolate the 7x. Remember what you do to one side you do to the other, so then you would subtract 2 from 30 as well giving you 7x=28. After that in order to isolate x, you would divide by 7 on both sides giving you x=4.
<span> The establishment of the League of Nations</span>