SOLUTION: Mark has 3 times more marbles than Mike has. Together Mark and Mike have 400 marbles. How many marbles do Mark and Mike each have?

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Question 894393: Mark has 3 times more marbles than Mike has. Together Mark and Mike have 400 marbles. How many marbles do Mark and Mike each have?
Answer by Alan3354(69443) About Me  (Show Source):
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Mark has 3 times more marbles than Mike has. Together Mark and Mike have 400 marbles. How many marbles do Mark and Mike each have?
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3x more = 4 times as many
Mark = 4*Mike
Mark + Mike = 400
4*Mike + Mike = 400
5*Mike = 400
Mike has 80 marbles
Mark has 320 marbles