Which countries' boundaries changed as a result of World War I or World War II? Germany Soviet Union Estonia Poland Spain Sweden Portugal Czechoslovakia

Correct answers are Germany Soviet Union Estonia Poland, Czechoslovakia

Explanation:

When it comes to Germany, that country lost many territories after WW1 including Alsace Lorraine for example. After WW2 boundaries of Germany also changed when the country was divided.

After WW1 Soviet Union lost certain territories, mostly around Baltic and in Poland, but after WW2 they increased their territory.

Estonia changed its boundaries after WW1 when country was created.

Poland was also created after WW1, as it was the case with Czechoslovakia.

War didn't affect the borders of Spain Sweden and Portugal.

(4,-2)

explanation:

6x+4y=16

-6x-9y=-6

-5y=10

y=-2

x=4