Mathematics, 20.11.2020 19:30 princessjsl22

A bag contains 120 marbles. Some are red and the rest are black. There are 19 red marbles for every black marble. How many red marbles are in the bag? Show your reasoning . Please help me!!

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A bag contains 120 marbles. Some are red and the rest are black. There are 19 red marbles for every...

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