Question
Box R and Box S contained a total of 72 pens. After 25 pens were transferred from Box R to B, Box S contained thrice as many pens as Box R. How many pens were there in Box R at first?
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Box R and Box S contained a total of 72 pens. After 25 pens were transferred from Box R to B, Box S contained thrice as many pens as Box R. How many pens were there in Box R at first?