Answer:
Big cities, convenience.
Explanation:
In the most densely populated areas of Europe and Russia, there are cities which means that things will be close to people. Cities provide convenient for people, they are more populated.
Answer is: Carl Ritter.
Carl Ritter (1779 –1859) was a German geographer (<span>one of the founders of modern </span>geography) and scientist.
His nineteen-volume work is "<span>Geography in Relation to Nature and the History of Mankind"</span>, written 1816–1859. Work <span>was left incomplete at the time of Ritter's death.</span>
subtract 8 from both sides leaving
combine -2x+-8x =-10x
divide both sides by ten
