Question
Irene had thrice as many marbles as pens at first. She removed 4 marbles and 2 pens each time. In the end, there were 13 marbles and 1 pen left. How many marbles and pens did Irene have at first?
4 m

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Irene had thrice as many marbles as pens at first. She removed 4 marbles and 2 pens each time. In the end, there were 13 marbles and 1 pen left. How many marbles and pens did Irene have at first?