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Ricky collected 3 times as many wind-up toys as Nathan. When Ricky gave Nathan some of his wind-up toys, they each had 8. How many wind-up toys had Ricky given to Nathan?

 Sep 17, 2022
 #1
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Nathan starts with N toys 

Which means that Ricky starts with 3N toys

3N-k = 8        N+k=8

 

Solve simultaneously.

 Sep 17, 2022
 #2
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1. Put it in a equation: 3n-x = n+x=8

2. Add them up:4n = 16 <=> n =4      Add x to both sides : 3n = n+2x <=> 2x=2n x =n
3. Since x=n and n=4 we have the answer: x=4

 Sep 17, 2022

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