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15 March, 13:55

In a group of 30 children, there are 4 times as many boys as girls. How many girls are there?

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  1. 15 March, 14:16
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    X=mumber of boys

    y=number of girls.

    I suggest this system of equations:

    x+y=30

    x=4y

    We can solve this system of equations by susbtitution method.

    4y+y=30

    5y=30

    y=30/5=6

    x=4y

    x=4*6=24

    Answer: there are 6 girls
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