Question
There were 349 purple, pink and yellow marbles in a box. Given that there were 102 more purple marbles than yellow marbles and 85 more pink marbles than yellow marbles, how many yellow marbles were there in the box?
4 m

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There were 349 purple, pink and yellow marbles in a box. Given that there were 102 more purple marbles than yellow marbles and 85 more pink marbles than yellow marbles, how many yellow marbles were there in the box?