What did the Greek city states have in common?

Though the Greek city-states were fiercely independent, these city states did have many things in common. They worshipped the same gods, they spoke the same language, and they had the same cultural background. And in times of foreign invasion (such as the Persian wars), they would band together to fight a common foe.

Explanation:

Though the Greek city-states were fiercely independent, these city states did have many things in common. They worshipped the same gods, they spoke the same language, and they had the same cultural background. And in times of foreign invasion (such as the Persian wars), they would band together to fight a common foe

cd's

explanation:

simplify brackets

8 - 2a - 7 = a + 40

simplify 8 - 2a - 7 to -2a + 1

-2a + 1 = a + 40

add 2a to both sides

1 = a + 40 + 2a

simplify a + 40 + 2a to 3a + 40

1 = 3a + 40

subtract 40 from both sides

1 - 40 = 3a

simplify 1 - 40 o -39

-39 = 3a

divide both sides by 3

-39/3 = a

simplify 39/3 to 13

-13 = a

switch sides

a = -13