Mathematics, 05.11.2020 21:10, elijahmaderos25491

John had 7 red marble and 5 blue marble in a box. Today, he put some marble in the box and the ratio is 10 red to 19 total. How many blue marbles does he put today in the box?

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John had 7 red marble and 5 blue marble in a box. Today, he put some marble in the box and the ratio...