Help and explain
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City-dwellers

Explanation:

In Saudi Arabia, the social structure is composed of mainly nomads but also a small group of people living in cities, called city-dwellers. Although they descend from the bedouin people, they see themselves as socially superior to them. In the same way, people from rural areas don´t consider city-dwellers as peers. The cultural rivalry between urban and rural areas remains in the present.

"germany's geographic location was an advantage when it was on the offensive in the war because it was situated next to an extremely wide river, the rhine, which was difficult for the allies to cross."

8 - (2a + 7) = a + 40     distribute/multiply - into (2a + 7)

8 - 2a - 7 = a + 40

1 - 2a = a + 40       add 2a on both sides

1 = 3a + 40         subtract 40 on both sides

-39 = 3a       divide 3 on both sides

-13 = a

[proof]

8 - (2a + 7) = a + 40

8 - (2(-13) + 7) = -13 + 40

8 - (-26 + 7) = 27

8 - (-19) = 27

8 + 19 = 27

27 = 27