Question
There were 333 purple, pink and yellow balls in a packet. Given that there were 170 more purple balls than yellow balls and 79 more pink balls than yellow balls, how many yellow balls were there in the packet?
4 m

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There were 333 purple, pink and yellow balls in a packet. Given that there were 170 more purple balls than yellow balls and 79 more pink balls than yellow balls, how many yellow balls were there in the packet?