Hi there!
»»————- ★ ————-««
I believe your answer is:
[tex]3(6x+1)[/tex]
»»————- ★ ————-««
Here’s why:
⸻⸻⸻⸻
[tex]\boxed{\text{Creating an Equivalent Expression}}\\\\18x+3\\--------\\\text{Factoring}\\\\\rightarrow18x+3\\\\\rightarrow\boxed{3(6x+1)}\\\\\boxed{\text{'3' is a common factor in '18' and '3'.}}[/tex]
⸻⸻⸻⸻
[tex]\text{An equivalent expression to } 18x + 3 \text{ would be \boxed{3(6x+1)}.}[/tex]
⸻⸻⸻⸻
»»————- ★ ————-««
Hope this helps you. I apologize if it’s incorrect.