Answer:
The number is 5.
Step-by-step explanation:
Let the number be [tex]$ x $[/tex].
Given [tex]$ 80 $[/tex] is decreased [tex]$ 3 $[/tex] times [tex]$ x $[/tex].
[tex]$ \implies 80 - 3x $[/tex]
[tex]$ 5 $[/tex] times the number increased by [tex]$ 8 $[/tex].
[tex]$ 5(x + 8) $[/tex]
This means:
[tex]$ 8 - 3x = 5(x + 8) $[/tex]
[tex]$ \implies 8x = 40 $[/tex]
[tex]$ \implies x = 5 $[/tex]
