liamBedford liamBedford

26-04-2016
Mathematics

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There are 120 children there are twice as many boys than girls how many girls are there?

Respuesta :

26-04-2016

Boys are b
Girls are g

b + g = 120
2g = b

Substitute the second equation into the first

2g + g = 120
3g = 120
g = 40

Plug in g = 40 and solve for b

b + g = 40
b + 40 = 120
b = 80

There are 40 girls and 80 boys.

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