Question

A boy was having x marbles. He doubled it by purchasing more marbles. His friend gave him 4 marbles. He divided all the marbles among 7 boys. Each boy got 2 marbles. How many marbles did he have at first?

Answer 1

firstly the boy had 5 marbles every boy got two marbles so 2 x 7= 14 but 4 marbles were given by his friend so 14-4=10 after purchasing he doubled them so 10 divided by 2 we get 5
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Answer 2

let he had x marbles
total marble =2x+4
each boy got =2x+4/7=2
2x+4=14
x=5