Question by Lê Quốc Trần Anh - Discuss with MathYouLike

Lê Quốc Trần Anh Coordinator

06/07/2018 at 03:33

A bag contains a total of 36 marbles colored either red or blue. Twice the number of red marbles is 6 less than the number of blue marbles. How many red marbles are in the bag?

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Nguyễn Mạnh Hùng 06/07/2018 at 08:27

Call the number of red marbles is r

the number of blue marbles is b

We have: r + b = 36

and 2r + 6 = b

=> r + b = r + 2r + 6 = 36

=> r = 10
Lê Quốc Trần Anh selected this answer.

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