Answer:
[tex]\large\boxed{a<14\to a\in(-\infty,\ 14)}[/tex]
Step-by-step explanation:
a - 4 < 10 add 4 to both sides
a - 4 + 4 < 10 + 4
a < 14
a - 4 < 10
Add 4 to each side
a - 4+4 < 10+4
