Question
There was an equal number of purple and gold marbles in a box at first. After 11 gold marbles were taken out and 40 purple marbles were added into the box, there was 14 as many gold marbles as purple marbles. Find the number of gold marbles in the box at first.
4 m

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There was an equal number of purple and gold marbles in a box at first. After 11 gold marbles were taken out and 40 purple marbles were added into the box, there was 14 as many gold marbles as purple marbles. Find the number of gold marbles in the box at first.