What justice systems existed in England in the late 1300s:

9–11 January – Knights Templar arrested in England; Edward II appropriates their lands. 25 January – King Edward II marries Isabella of France. 25 February – coronation of King Edward II. ... 18 May – Edward forced to banish Piers Gaveston by his barons.

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

the colonial period, since this was a time of mass immigration from a variety of people from europe.