Answer:
The number is 2,5
Step-by-step explanation: For solve this problem we have to made a polinomial function as follows:
We know that is a half number that means X/2, the next step we have to decrese by 8, [tex]\frac{X}{2}[/tex]-8, finally the result is (-3).
[tex]\frac{x}{2}[/tex] -8=-3 ⇒ [tex]\frac{x}{2}[/tex]=-3+8
[tex]\frac{x}{2}[/tex]=5 ⇒ x=[tex]\frac{5}{2}[/tex] or x=2.5
