Question

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. How many islands and peninsulas did Ni Hua visit?

Answer 1

Answer:

855

Step-by-step explanation:

because he travels 45 in 19 island

Answer 2

Hua visited 12 islands and 7 peninsulas .

Explanation:

Let x = number of islands that he visited.

y = number of peninsula that he visited.

According to the given information , we have the following system of equations :

$2x+3y=45--------------(1)\\\\ x+y=19-------------------(2)$

Multiply 2 on both sides of equation (2), we get

$2x+2y=38=----------(3)$

Eliminate equation (3) from (1) , we get

$y=7$

Put value of y in (2), we get

$x+7=19\Rightarrow\ x=19-7=12$

Hence, Hua visited 12 islands and 7  peninsulas .

# Learn more :

Solve following system of equations by elimination​

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