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Adam and Justin had a total of 764 marbles. They used some of their marbles to make a marble track each and keep the remaining marbles. Adam had 1/3 as many marbles remaining as Justin after making d their marble tracks. The number of marbles Justin used to make his marble track was 63 more more than what he had left. Justin used 3 times as many marbles is Justin to make his marble track. How many marbles did Adam have at first?

 Jul 6, 2021
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let the number of marbles Adam left be (a)

the number of marbles Justin left will be 3a

the number of marbles Justin used will be 3a+63 which is 3 times to what Adam used

adam used a+21 marbles

adding the used and remaining marbes we get

(a+21)+(3a+63)+a+3a=764

8a+84=764

8a=680

a=85

the number of marbles Adam used are a+21=106

total number of marbles Adam had at first=85+106=191 marbles

 Jul 6, 2021

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