The purpose of the preamble of the constitution is to

establish and maintain the sovereignty of individual states

describe and enforce the powers of the confederation government.

introduce and explain the core ideas of the governments important principles

define and distinguish the roles of domestic and foreign policies

i just did something on this guy a few days a go give me two minutes to find it in my notes.

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

c) he felt the constitution clearly gave states this right.