5 (9z + 2) - 5 = 815

To solve the equation 5(9z + 2) - 5 = 815, follow these steps:

1. Distribute the 5 to the terms in parentheses:
45z + 10 - 5 = 815

2. Simplify the equation:
45z + 5 = 815

3. Subtract 5 from both sides of the equation to isolate the variable:
45z = 810

4. Divide both sides of the equation by 45 to solve for z:
z = 810 ÷ 45

5. Simplify the division:
z = 18

Therefore, the solution to the equation is z = 18.