In this equation where did the number three come from if anyone can explain to me be great because I am completely confused

Answer:
The multiplication of 3
Step-by-step explanation:
when you see the 3(6y+1), it basically means multiply the 3 with the 6y and the 1. Therefore, it would be 18y+3
:D
Answer:
From the mulitiplication of 3
Step-by-step explanation: