FrankieMaee FrankieMaee

23-03-2016
Mathematics

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

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Аноним Аноним

23-03-2016

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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