Step 1 :Distribute -5 into the parentheses to get -15x - 40 - x = -8.
Step 2 :Combine like terms to get -16x - 40 = -8.
Step 3 :Add 40 to both sides of the equation to get -16x = 32.
Step 4 :Divide both sides by -16 to solve for x.
Step 5 :The solution to the equation is \( \boxed{-2} \).