Answer:
16
1, 2, 3, 4, 6, 7, 8, 12, 14, 21, 24, 28, 42, 56, 84, 168
answer is 15 and second one i dont know yet sorry am doing scoo
Step-by-step explanation:
4
4b + 5 = 1 + 5b
4 = 1b
4 = b