Question
Mark had 3 times as many marbles as Cody. After Cody bought another 40 marbles, Mark had twice as many marbles as Cody. How many marbles did the two boys have altogether in the end?
4 m

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Mark had 3 times as many marbles as Cody. After Cody bought another 40 marbles, Mark had twice as many marbles as Cody. How many marbles did the two boys have altogether in the end?