Pls I really need dis asap : What was a major cause of the fall of the Western Roman Empire? A. Hannibal Barca invaded Italy and destroyed the city of Rome. B. Slave revolts and plebeian uprisings weakened the republic c. The Roman government was weak and ineffective. D. Julius Caesar weakened the Roman army

The Roman Government was weak and ineffective. I had this exact question.

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