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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 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 is 10 red to 19 total. How many blue marbles does he put today in the box?

User Alex Vergara
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2 Answers

3 votes

Answer:10 - 19 =9 answer 9 blue marbles

Explanation:

User Gaurang S
by
8.4k points
3 votes

Answer:

He added 14 blue marbles to the box today

User Jasti
by
8.3k points
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