Answer:
-59
Step-by-step explanation:
x3 is meaningless; I assume you meant x^3.
If that's the case, then:
3x + 8 = -4 is equivalent to 3x = -12, so that x = -4.
Then (-4)^3 + 5 = -64 + 5 = -59
the question can be solved by some simple mathematical steps.
If 3x + 8 = -4
then, x3 + 5 =?
from 3x + 8 = -4
collect the like terms
3x = -4 - 8
3x = -12
divide both sides by 3
3x/3 = -12/3
x = -4
if x = -4 then to find x3 + 5 will imply that we will insert the value of x = -4 into the x3 + 5
-4 ³ + 5
-64 + 5
= -59
therefore the value of x3 + 5 is solved to be -59
