The celts fled to ireland with the invasion of the

The Celts fled to Ireland with the invasion of the Anglo-Saxons

Explanation:

The Anglo-Saxons were a Germanic tribe with a diverse background mostly associated with modern-day Germany and Denmark.

With the gradual decline of the Roman Empire, the province of Britannia, like rest of Europe was vulnerable to local warlords.

Gradually, the Anglo-Saxons found their new autonomy from the Romans, empowering, and gradually decided to expand and build a small Empire.

Locally, they were in direct confrontation wit the Celtic people, who had to flee to the Isle of Ireland.

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