Final answer:
The expression equivalent to -8x - 2(5 + 4x) is -16x - 10.
Step-by-step explanation:
To find the expression equivalent to -8x - 2(5 + 4x), we need to distribute the -2 to both terms inside the parentheses. This gives us:
-8x - 10 - 8x
Next, we can combine like terms by adding the coefficients of the x terms:
-16x - 10
So, the expression equivalent to -8x - 2(5 + 4x) is -16x - 10.