The ratio of boys to girls is 1:2. Two boys and two girls enter the room and the ratio is now 5:9. How many boys and girls

Question

The ratio of boys to girls is 1:2.
Two boys and two girls enter the
room and the ratio is now 5:9.
How many boys and girls were
there originally?

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Diễm Kiều 6 months 2021-08-04T12:54:21+00:00 1 Answers 19 views 0

Answers ( )

    0
    2021-08-04T12:55:50+00:00

    Answer:let the original number of boys be x

    x:2x=1:2

    x+2:2x+2=5:9

    9x+18=10x+10

    x=8

    2x=16

    Step-by-step explanation:

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )