Ni Hua is an adventurous traveler. He skydives twice in every island he visits and skydives thrice in every peninsula he visits.
In the last decade, Ni Hua went skydiving a total of 45 times in the 19 islands and peninsulas that he visited.
2 answers:
Solution:
Let Ni Hua visited x island and y peninsulas.
we are given that
Ni Hua went skydiving a total of 45 times in the 19 islands and peninsulas that he visited.
So we can write


Now solve these two equations togethere using substitution as below:

So we can write 
Hence Let Ni Hua visited 7 island and 12 peninsulas.
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