Answer:
4a) 9n - 3
4b) n = 11
Step-by-step explanation:
3(3n - 1)
9n - 3
9n - 3 = 96
9n - 3 + 3 = 96 + 3
9n = 99
9n ÷ 9 = 99 ÷ 9
n = 11