What ancient region's name can be translated "land between the rivers?
a.
babylonia
b.
sumer
c.
akkad
d.
mesopotamia

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

literally just took the test, got a 100%. i couldn't be bothered to type it all out, so i just took pictures.

should be in order from q 1 to 35.