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

In a group of 30 children, there are 4 times as many boys as girls. How many girls are there?
asked 159k views
1 vote
In a group of 30 children, there are 4 times as many boys as girls. How many girls are there?

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User Tristan Nemoz
by
8.9k points

1 Answer

5 votes
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
answered
User Ostap Maliuvanchuk
by
9.1k points
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