Mathematics, 25.06.2019 23:00 JamesLachoneus

Of 560 marbles in a bag, 65% are red and the rest are blue. after 28 red marbles are replaced with blue ones, how many blue marbles need to be added to the bag so that the 65% of all marbles are blue?

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Of 560 marbles in a bag, 65% are red and the rest are blue. after 28 red marbles are replaced with b...

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