Some marbles in a bag are red and the rest are blue. If one red marble is removed, then one-seventh of the remaining marbles are red.

Question

Some marbles in a bag are red and the rest are blue. If one red marble is removed,
then one-seventh of the remaining marbles are red. If two blue marbles are removed
instead of one red, then one-fifth of the remaining marbles are red. How many
marbles were in the bag original

Pls give EXPLANATION

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Lệ Thu 3 months 2021-08-02T18:38:22+00:00 1 Answers 4 views 0

Answers ( )

    0
    2021-08-02T18:40:13+00:00

    Answer:

    22

    Step-by-step explanation:

    Let r be red and b be blue

    1/7(r-1+b)=r-1

    1/5(r+b-2)=r

    r-1+b=7(r-1)

    r+b-2=5r

    r-1+b=7r-7

    1=7r-7-5r

    8=2r

    r=4

    1/5(4+b-2)=4

    2+b=20

    b=18

    18+4=22

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