Answer:
71
Step-by-step explanation:
5, 7 nag add lang nang 2 and 7 x 3 = 21 and mag add ulit ng 2 naging 23 na 23 x 3 = 69 and mag add ulit ng 2 is 71 and the final answer is 71
5, (6), 7
21,(22), 23
69, (70), 71
71 is the answer
