Question 41174
Addition and subtraction are inverse operations.
Multiplication and division are inverse operations.

-2 + 8n = 40

Since addition and subtration are inverse operations, let's add +2 to both sides.

+2-2+8n = 40

+2-2 makes 0.

0 +8n = 40
8n = 40

n is multiplied by 8. To leave n alone we should DIVIDE both sides by 8 since multiplication and division are inverse operations.

8n/8 = 40/8
n = 5