Answer:
3
Step-by-step explanation:
6n = 3/5 x 5 (n+3)
6n = 3 (n+3)
6n = 3n + 9
6n - 3n = 9
3n = 9
=3
6n=3/5(5n+15)
6n=3n+9
6n-3n=9
3n=9
3n/3=9/3
n=3
