Question
Mark had 25% as many buttons as Pierre. After Mark and Pierre bought another 19 buttons and 6 buttons respectively, Mark had 50% more buttons than Pierre. How many buttons did Mark have at first?
4 m

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Mark had 25% as many buttons as Pierre. After Mark and Pierre bought another 19 buttons and 6 buttons respectively, Mark had 50% more buttons than Pierre. How many buttons did Mark have at first?